Q: Is 721,422 a Prime Number?
A: No, 721,422 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 721422 can be evenly divided by 1 2 3 6 9 13 18 26 39 78 117 234 3,083 6,166 9,249 18,498 27,747 40,079 55,494 80,158 120,237 240,474 360,711 and 721,422, with no remainder.
Since 721,422 cannot be divided by just 1 and 721,422, it is not a prime number.