Q: Is 321,855 a Prime Number?
A: No, 321,855 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 321855 can be evenly divided by 1 3 5 15 43 129 215 499 645 1,497 2,495 7,485 21,457 64,371 107,285 and 321,855, with no remainder.
Since 321,855 cannot be divided by just 1 and 321,855, it is not a prime number.