Q: Is 521,142 a Prime Number?
A: No, 521,142 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 521142 can be evenly divided by 1 2 3 6 86,857 173,714 260,571 and 521,142, with no remainder.
Since 521,142 cannot be divided by just 1 and 521,142, it is not a prime number.