Q: Is 1,309,221 a Prime Number?
A: No, 1,309,221 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 1309221 can be evenly divided by 1 3 9 17 43 51 129 153 199 387 597 731 1,791 2,193 3,383 6,579 8,557 10,149 25,671 30,447 77,013 145,469 436,407 and 1,309,221, with no remainder.
Since 1,309,221 cannot be divided by just 1 and 1,309,221, it is not a prime number.