Q: Is 143,521 a Prime Number?

A: No, 143,521 is not a prime number.

Why is 143,521 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 143521 can be evenly divided by 1 7 29 49 101 203 707 1,421 2,929 4,949 20,503 and 143,521, with no remainder.

Since 143,521 cannot be divided by just 1 and 143,521, it is not a prime number.

Number	143,519	143,520	143,522	143,523
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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