Q: Is 721,480 a Prime Number?
A: No, 721,480 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 721480 can be evenly divided by 1 2 4 5 8 10 17 20 34 40 68 85 136 170 340 680 1,061 2,122 4,244 5,305 8,488 10,610 18,037 21,220 36,074 42,440 72,148 90,185 144,296 180,370 360,740 and 721,480, with no remainder.
Since 721,480 cannot be divided by just 1 and 721,480, it is not a prime number.