Q: Is 521,425 a Prime Number?
A: No, 521,425 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 521425 can be evenly divided by 1 5 25 20,857 104,285 and 521,425, with no remainder.
Since 521,425 cannot be divided by just 1 and 521,425, it is not a prime number.