Q: Is 721,248 a Prime Number?
A: No, 721,248 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 721248 can be evenly divided by 1 2 3 4 6 8 11 12 16 22 24 32 33 44 48 66 88 96 132 176 264 352 528 683 1,056 1,366 2,049 2,732 4,098 5,464 7,513 8,196 10,928 15,026 16,392 21,856 22,539 30,052 32,784 45,078 60,104 65,568 90,156 120,208 180,312 240,416 360,624 and 721,248, with no remainder.
Since 721,248 cannot be divided by just 1 and 721,248, it is not a prime number.