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Roman M.
dual 11 1110 1000
Octal 1750
Duodecimal 6B4
Hexadecimal 3E8
Morse code - - - - - - - - - - - - - - - - - - - 
Chinese 一千 (yī qiān)
Mathematical properties
sign positive
parity straight
Divider 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 1000

The thousand (1000, abbreviation: thousand), also called one thousand , is an even natural number and a cube number .


The German numeral thousand has developed from the Old High German thûsunt, thûshundi , this from Germanic þûsundi . This, in turn, is a combination of the numeral Hundert - hundi with a prefix * thus , which means “much” or “large” and was formed from an Indo-European root * tÐu-, * týu- , which originally meant “swell”. Thousand literally means “great hundred”. German also knows the plural formation thousands ("several thousand"), which however does not occur in numerals ( two thousand etc.).

The Latin word mille for a thousand (of which also the Roman numeral symbol M ) and the Greek χίλιοι (chilioi) are part of numerous foreign words in English, especially in the prefixes of the metric system millimeter (one thousandth) and kilo (one thousand times) , but also in words like Millennium (to German : Millennium ) or Chiliarch . The word mile (thousand double step, Latin passus ) also comes from the Latin word mille .

Thousand-year-old giant oak in Borlinghausen

In many linguistic formations, thousand stands for a particularly large number - it is the highest non-compound number in German. This is the case with the millipede or the millennial eggs , a specialty of Chinese cuisine. Many legendary plants have the addition of millennia , for example the “millennial linden” in Götzingen or the “millennial oak” in Borlinghausen .

Number names

From the number 1000 onwards, fundamentally new number names are only introduced when they increase by a factor of 1000. A million consists of 1000 times 1000, a billion consists of 1000 million, a trillion consists of 1000 billion, etc. A change in the number name with regard to the Latin base, a change that does not only refer to the name ending -ion or iarde , In German, however, it needs to be multiplied by a million .

Unit of measure prefixes

Identifying the thousand times a unit which is prefix kilo (abbreviated k) used a thousandth of a unit with whereas Milli (abbreviated to m) is referred to. For example, a milligram (mg) is one thousandth of a gram.

When referring to the unit of measurement byte in computer science, the term kilobyte (kB) is now understood to mean exactly 1000 bytes. That is 10 3 bytes and not 2 10 = 1 024 bytes. To name 2 10 bytes, the name Kibibyte (abbreviated: KiB) is suggested; Kibi (Ki) is a binary prefix while Kilo (k) is a decimal prefix.

Analogous to the use of new names for numbers of at least 1000, neighboring prefixes for units of measurement that result in an enlargement or reduction factor of at least 1000 also differ by a factor of 1000. Thus the multiplication prefixes kilo (k), M (mega) are increased. , G (Giga), T (Tera) successively by a factor of 1000 and thus denote a multiplication of the unit of measurement by 1000, one million, one billion or one trillion, while the prefixes for parts of a unit of measurement, m (milli), μ ( Micro), n (nano), p (pico), successively decrease by three orders of magnitude and divide the unit of measurement by 1000, one million, one billion or one trillion.

On the other hand, new names for binary prefixes are assigned each time it is enlarged by a factor of 2 10 = 1024.


  • The thousand is a number of steps in the decimal system : one thousand is 1000 = 10 · 10 · 10 = 10 3 .
  • Since 1000 can be represented as a natural number with an exponent of 3, 1000 is a cube number
  • 1000 is an even number as well as a harshad number .
  • In practice, it is relevant for expressing proportions; the reference to a size is sometimes expressed in thousandths of a per thousand .

Common abbreviations

In addition to the official abbreviation of thousand as thousand, further abbreviations are in use:

  • k (abbreviation for kilo ) is used as a prefix for a thousand times a unit of measurement, so 1 kg corresponds to 1000 g. In English-speaking countries in particular, k is also used as an abbreviation for 1000 in other contexts, e.g. B. 1k instead of 1000. This form is also used for abbreviations of compound words. B. Windows 2000 abbreviated as Win2k.
  • The apostrophe ' is used as an abbreviation for thousand, especially in the economic field. So 5 'is written instead of 5,000; the following 5 '' for 5,000,000.
  • T. instead of the official abbreviation Tsd.


The concept of the millennial reign of Christ, i.e. the millennial kingdom, comes from the Revelation of John . Belief in the second coming of Jesus Christ and in the establishment of his millennial kingdom is known as millenarianism or chiliasm. In the 20th century, the National Socialists also made use of this term for propaganda purposes, through the creation of which they claimed to “fulfill” German history, see here .

Web links

Wiktionary: a thousand  - explanations of meanings, word origins, synonyms, translations
Commons : 1000 (number)  - collection of images, videos and audio files