Q: Is 421,487 a Prime Number?
A: No, 421,487 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 421487 can be evenly divided by 1 11 38,317 and 421,487, with no remainder.
Since 421,487 cannot be divided by just 1 and 421,487, it is not a prime number.