Q: Is 520,556 a Prime Number?
A: No, 520,556 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 520556 can be evenly divided by 1 2 4 181 362 719 724 1,438 2,876 130,139 260,278 and 520,556, with no remainder.
Since 520,556 cannot be divided by just 1 and 520,556, it is not a prime number.