Q: Is 2,145 a Prime Number?

A: No, 2,145 is not a prime number.

Why is 2,145 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 2145 can be evenly divided by 1 3 5 11 13 15 33 39 55 65 143 165 195 429 715 and 2,145, with no remainder.

Since 2,145 cannot be divided by just 1 and 2,145, it is not a prime number.

Number	2,143	2,144	2,146	2,147
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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