Q: Is 421,654 a Prime Number?
A: No, 421,654 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 421654 can be evenly divided by 1 2 210,827 and 421,654, with no remainder.
Since 421,654 cannot be divided by just 1 and 421,654, it is not a prime number.