Q: Is 165,321 a Prime Number?
A: No, 165,321 is 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 165321 can be evenly divided by 1 3 9 13 27 39 81 117 157 351 471 1,053 1,413 2,041 4,239 6,123 12,717 18,369 55,107 and 165,321, with no remainder.
Since 165,321 cannot be divided by just 1 and 165,321, it is not a prime number.