Q: Is 421,407 a Prime Number?
A: No, 421,407 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 421407 can be evenly divided by 1 3 7 9 21 63 6,689 20,067 46,823 60,201 140,469 and 421,407, with no remainder.
Since 421,407 cannot be divided by just 1 and 421,407, it is not a prime number.