Q: Is 421,579 a Prime Number?
A: No, 421,579 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 421579 can be evenly divided by 1 103 4,093 and 421,579, with no remainder.
Since 421,579 cannot be divided by just 1 and 421,579, it is not a prime number.