Q: Is 158,509 a Prime Number?

A: No, 158,509 is not a prime number.

Why is 158,509 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 158509 can be evenly divided by 1 13 89 137 1,157 1,781 12,193 and 158,509, with no remainder.

Since 158,509 cannot be divided by just 1 and 158,509, it is not a prime number.

Number	158,507	158,508	158,510	158,511
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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