Q: Is 638,742 a Prime Number?
A: No, 638,742 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 638742 can be evenly divided by 1 2 3 6 13 19 26 38 39 57 78 114 247 431 494 741 862 1,293 1,482 2,586 5,603 8,189 11,206 16,378 16,809 24,567 33,618 49,134 106,457 212,914 319,371 and 638,742, with no remainder.
Since 638,742 cannot be divided by just 1 and 638,742, it is not a prime number.