Q: Is 428,607 a Prime Number?
A: No, 428,607 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 428607 can be evenly divided by 1 3 9 47,623 142,869 and 428,607, with no remainder.
Since 428,607 cannot be divided by just 1 and 428,607, it is not a prime number.