Q: Is 638,120 a Prime Number?
A: No, 638,120 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 638120 can be evenly divided by 1 2 4 5 7 8 10 14 20 28 35 40 43 53 56 70 86 106 140 172 212 215 265 280 301 344 371 424 430 530 602 742 860 1,060 1,204 1,484 1,505 1,720 1,855 2,120 2,279 2,408 2,968 3,010 3,710 4,558 6,020 7,420 9,116 11,395 12,040 14,840 15,953 18,232 22,790 31,906 45,580 63,812 79,765 91,160 127,624 159,530 319,060 and 638,120, with no remainder.
Since 638,120 cannot be divided by just 1 and 638,120, it is not a prime number.