Q: Is 421,708 a Prime Number?
A: No, 421,708 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 421708 can be evenly divided by 1 2 4 7 14 28 15,061 30,122 60,244 105,427 210,854 and 421,708, with no remainder.
Since 421,708 cannot be divided by just 1 and 421,708, it is not a prime number.