Q: Is 521,630 a Prime Number?
A: No, 521,630 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 521630 can be evenly divided by 1 2 5 10 52,163 104,326 260,815 and 521,630, with no remainder.
Since 521,630 cannot be divided by just 1 and 521,630, it is not a prime number.