Q: Is 172,665 a Prime Number?

A: No, 172,665 is not a prime number.

Why is 172,665 not a prime number?

A prime number is a natural number, greater than one, that can only be divided by 1 and itself.

The number 172665 can be evenly divided by 1 3 5 9 15 27 45 135 1,279 3,837 6,395 11,511 19,185 34,533 57,555 and 172,665, with no remainder.

Since 172,665 cannot be divided by just 1 and 172,665, it is not a prime number.

Number	172,663	172,664	172,666	172,667
Prime?	yes	no	no	no

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

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