Q: Is 521,204 a Prime Number?
A: No, 521,204 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 521204 can be evenly divided by 1 2 4 229 458 569 916 1,138 2,276 130,301 260,602 and 521,204, with no remainder.
Since 521,204 cannot be divided by just 1 and 521,204, it is not a prime number.