Q: Is 721,266 a Prime Number?
A: No, 721,266 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 721266 can be evenly divided by 1 2 3 6 7 13 14 21 26 39 42 78 91 182 273 546 1,321 2,642 3,963 7,926 9,247 17,173 18,494 27,741 34,346 51,519 55,482 103,038 120,211 240,422 360,633 and 721,266, with no remainder.
Since 721,266 cannot be divided by just 1 and 721,266, it is not a prime number.