Q: Is 21,125,135 a Composite Number?

Why is 21,125,135 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 21,125,135 can be evenly divided by 1 5 17 85 157 785 1,583 2,669 7,915 13,345 26,911 134,555 248,531 1,242,655 4,225,027 and 21,125,135, with no remainder.

Since 21,125,135 cannot be divided by just 1 and 21,125,135, it is a composite number.

More Examples

• All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).