1000 (number)

• One thousand or 1000 is a natural number following 999 and preceding 1001.
• $1000$ is the first kilonumber while $1000000$ is the first meganumber.
• $1000$'s divisors are $1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250,$ and $500$.
• $1000$ has factorization $2^3\cdot5^3$.
• $1000$ has two representations as the sum of two squares,$10^2 + 30^2$ and $18^2 + 26^2$.