Q: Is 12,255 a Prime Number?
A: No, 12,255 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 12255 can be evenly divided by 1 3 5 15 19 43 57 95 129 215 285 645 817 2,451 4,085 and 12,255, with no remainder.
Since 12,255 cannot be divided by just 1 and 12,255, it is not a prime number.