Q: Is 321,428 a Prime Number?
A: No, 321,428 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 321428 can be evenly divided by 1 2 4 107 214 428 751 1,502 3,004 80,357 160,714 and 321,428, with no remainder.
Since 321,428 cannot be divided by just 1 and 321,428, it is not a prime number.