Q: Is 721,206 a Prime Number?
A: No, 721,206 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 721206 can be evenly divided by 1 2 3 6 9 18 103 206 309 389 618 778 927 1,167 1,854 2,334 3,501 7,002 40,067 80,134 120,201 240,402 360,603 and 721,206, with no remainder.
Since 721,206 cannot be divided by just 1 and 721,206, it is not a prime number.