Q: Is 421,671 a Prime Number?
A: No, 421,671 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 421671 can be evenly divided by 1 3 140,557 and 421,671, with no remainder.
Since 421,671 cannot be divided by just 1 and 421,671, it is not a prime number.