Q: Is 721,602 a Prime Number?
A: No, 721,602 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 721602 can be evenly divided by 1 2 3 6 7 9 14 18 21 23 27 42 46 54 63 69 83 126 138 161 166 189 207 249 322 378 414 483 498 581 621 747 966 1,162 1,242 1,449 1,494 1,743 1,909 2,241 2,898 3,486 3,818 4,347 4,482 5,229 5,727 8,694 10,458 11,454 13,363 15,687 17,181 26,726 31,374 34,362 40,089 51,543 80,178 103,086 120,267 240,534 360,801 and 721,602, with no remainder.
Since 721,602 cannot be divided by just 1 and 721,602, it is not a prime number.