Q: Is 516,645 a Prime Number?
A: No, 516,645 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 516645 can be evenly divided by 1 3 5 9 15 27 43 45 89 129 135 215 267 387 445 645 801 1,161 1,335 1,935 2,403 3,827 4,005 5,805 11,481 12,015 19,135 34,443 57,405 103,329 172,215 and 516,645, with no remainder.
Since 516,645 cannot be divided by just 1 and 516,645, it is not a prime number.