Q: Is 391,420 a Prime Number?
A: No, 391,420 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 391420 can be evenly divided by 1 2 4 5 10 20 19,571 39,142 78,284 97,855 195,710 and 391,420, with no remainder.
Since 391,420 cannot be divided by just 1 and 391,420, it is not a prime number.