1000 (number)

This article is about the number 1000. For the year, see 1000.

1000 (1,000, one thousand or thousand for short) is the natural number after 999 and before 1001. One thousand thousands is known as a million.

← 999 1000 1001 →
List of numbers — Integers ← 0 1k 2k 3k 4k 5k 6k 7k 8k 9k →
Cardinal	one thousand
Ordinal	1000th (one thousandth)
Factorization	23× 53
Greek numeral	,Α´
Roman numeral	M
Binary	11111010002
Ternary	11010013
Quaternary	332204
Quinary	130005
Senary	43446
Octal	17508
Duodecimal	6B412
Hexadecimal	3E816
Vigesimal	2A020
Base 36	RS36

In Roman Numerals, 1000 is written as M.

Examples of a thousand

• The number of grams in a kilogram
• The number of millimeters in a meter
• The number of years in a millennium