Q: Is 428,457 a Prime Number?
A: No, 428,457 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 428457 can be evenly divided by 1 3 251 569 753 1,707 142,819 and 428,457, with no remainder.
Since 428,457 cannot be divided by just 1 and 428,457, it is not a prime number.