Q: Is 421,317 a Prime Number?
A: No, 421,317 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 421317 can be evenly divided by 1 3 9 13 39 117 169 277 507 831 1,521 2,493 3,601 10,803 32,409 46,813 140,439 and 421,317, with no remainder.
Since 421,317 cannot be divided by just 1 and 421,317, it is not a prime number.