Q: Is 421,566 a Prime Number?
A: No, 421,566 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 421566 can be evenly divided by 1 2 3 6 17 34 51 102 4,133 8,266 12,399 24,798 70,261 140,522 210,783 and 421,566, with no remainder.
Since 421,566 cannot be divided by just 1 and 421,566, it is not a prime number.