Q: Is 520,866 a Prime Number?
A: No, 520,866 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 520866 can be evenly divided by 1 2 3 6 9 18 19 38 57 114 171 342 1,523 3,046 4,569 9,138 13,707 27,414 28,937 57,874 86,811 173,622 260,433 and 520,866, with no remainder.
Since 520,866 cannot be divided by just 1 and 520,866, it is not a prime number.