Q: Is 721,572 a Prime Number?
A: No, 721,572 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 721572 can be evenly divided by 1 2 3 4 6 12 157 314 383 471 628 766 942 1,149 1,532 1,884 2,298 4,596 60,131 120,262 180,393 240,524 360,786 and 721,572, with no remainder.
Since 721,572 cannot be divided by just 1 and 721,572, it is not a prime number.