Q: Is 721,506 a Prime Number?
A: No, 721,506 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 721506 can be evenly divided by 1 2 3 6 19 38 57 114 6,329 12,658 18,987 37,974 120,251 240,502 360,753 and 721,506, with no remainder.
Since 721,506 cannot be divided by just 1 and 721,506, it is not a prime number.