Q: Is 421,836 a Prime Number?
A: No, 421,836 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 421836 can be evenly divided by 1 2 3 4 6 12 35,153 70,306 105,459 140,612 210,918 and 421,836, with no remainder.
Since 421,836 cannot be divided by just 1 and 421,836, it is not a prime number.