Q: Is 421,128 a Prime Number?
A: No, 421,128 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 421128 can be evenly divided by 1 2 3 4 6 8 9 12 18 24 36 72 5,849 11,698 17,547 23,396 35,094 46,792 52,641 70,188 105,282 140,376 210,564 and 421,128, with no remainder.
Since 421,128 cannot be divided by just 1 and 421,128, it is not a prime number.