Q: Is 428,217 a Prime Number?
A: No, 428,217 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 428217 can be evenly divided by 1 3 47 141 3,037 9,111 142,739 and 428,217, with no remainder.
Since 428,217 cannot be divided by just 1 and 428,217, it is not a prime number.