Q: Is 143,445 a Prime Number?

A: No, 143,445 is not a prime number.

Why is 143,445 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 143445 can be evenly divided by 1 3 5 15 73 131 219 365 393 655 1,095 1,965 9,563 28,689 47,815 and 143,445, with no remainder.

Since 143,445 cannot be divided by just 1 and 143,445, it is not a prime number.

Number	143,443	143,444	143,446	143,447
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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