Q: Is 421,641 a Prime Number?
A: No, 421,641 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 421641 can be evenly divided by 1 3 9 11 33 99 4,259 12,777 38,331 46,849 140,547 and 421,641, with no remainder.
Since 421,641 cannot be divided by just 1 and 421,641, it is not a prime number.