Q: Is 421,355 a Prime Number?
A: No, 421,355 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 421355 can be evenly divided by 1 5 11 47 55 163 235 517 815 1,793 2,585 7,661 8,965 38,305 84,271 and 421,355, with no remainder.
Since 421,355 cannot be divided by just 1 and 421,355, it is not a prime number.