Q: Is 721,149 a Prime Number?
A: No, 721,149 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 721149 can be evenly divided by 1 3 11 13 33 39 41 123 143 429 451 533 1,353 1,599 1,681 5,043 5,863 17,589 18,491 21,853 55,473 65,559 240,383 and 721,149, with no remainder.
Since 721,149 cannot be divided by just 1 and 721,149, it is not a prime number.