Q: Is 521,427 a Prime Number?
A: No, 521,427 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 521427 can be evenly divided by 1 3 179 537 971 2,913 173,809 and 521,427, with no remainder.
Since 521,427 cannot be divided by just 1 and 521,427, it is not a prime number.