Q: Is 421,338 a Prime Number?
A: No, 421,338 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 421338 can be evenly divided by 1 2 3 6 70,223 140,446 210,669 and 421,338, with no remainder.
Since 421,338 cannot be divided by just 1 and 421,338, it is not a prime number.