Q: Is 1,397,655 a Prime Number?
A: No, 1,397,655 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 1397655 can be evenly divided by 1 3 5 7 9 15 17 21 27 29 35 45 51 63 81 85 87 105 119 135 145 153 189 203 255 261 315 357 405 435 459 493 567 595 609 765 783 945 1,015 1,071 1,305 1,377 1,479 1,785 1,827 2,295 2,349 2,465 2,835 3,045 3,213 3,451 3,915 4,437 5,355 5,481 6,885 7,395 9,135 9,639 10,353 11,745 13,311 16,065 16,443 17,255 22,185 27,405 31,059 39,933 48,195 51,765 66,555 82,215 93,177 155,295 199,665 279,531 465,885 and 1,397,655, with no remainder.
Since 1,397,655 cannot be divided by just 1 and 1,397,655, it is not a prime number.