Q: Is 421,666 a Prime Number?
A: No, 421,666 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 421666 can be evenly divided by 1 2 7 14 30,119 60,238 210,833 and 421,666, with no remainder.
Since 421,666 cannot be divided by just 1 and 421,666, it is not a prime number.