Q: Is 321,945 a Prime Number?
A: No, 321,945 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 321945 can be evenly divided by 1 3 5 13 15 39 65 127 169 195 381 507 635 845 1,651 1,905 2,535 4,953 8,255 21,463 24,765 64,389 107,315 and 321,945, with no remainder.
Since 321,945 cannot be divided by just 1 and 321,945, it is not a prime number.