Q: Is 427,221 a Prime Number?
A: No, 427,221 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 427221 can be evenly divided by 1 3 9 27 15,823 47,469 142,407 and 427,221, with no remainder.
Since 427,221 cannot be divided by just 1 and 427,221, it is not a prime number.