Q: Is 420,255 a Prime Number?
A: No, 420,255 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 420255 can be evenly divided by 1 3 5 9 11 15 27 33 45 55 99 135 165 283 297 495 849 1,415 1,485 2,547 3,113 4,245 7,641 9,339 12,735 15,565 28,017 38,205 46,695 84,051 140,085 and 420,255, with no remainder.
Since 420,255 cannot be divided by just 1 and 420,255, it is not a prime number.