Q: Is 21,285 a Composite Number?

 A: Yes, 21,285 is a composite number.

Why is 21,285 a composite number?

A composite number is a number that can be divided evenly by more numbers than 1 and itself. It is the opposite of a prime number.

The number 21,285 can be evenly divided by 1 3 5 9 11 15 33 43 45 55 99 129 165 215 387 473 495 645 1,419 1,935 2,365 4,257 7,095 and 21,285, with no remainder.

Since 21,285 cannot be divided by just 1 and 21,285, it is a composite number.


More Examples

Number 21,28321,28421,28621,287
Composite? noyesyesyes
  • All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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