Q: Is 421,504 a Prime Number?
A: No, 421,504 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 421504 can be evenly divided by 1 2 4 8 16 32 37 64 74 89 128 148 178 296 356 592 712 1,184 1,424 2,368 2,848 3,293 4,736 5,696 6,586 11,392 13,172 26,344 52,688 105,376 210,752 and 421,504, with no remainder.
Since 421,504 cannot be divided by just 1 and 421,504, it is not a prime number.