Q: Is 1,388,772 a Prime Number?
A: No, 1,388,772 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 1388772 can be evenly divided by 1 2 3 4 6 7 9 11 12 14 18 21 22 27 28 33 36 42 44 54 63 66 77 84 99 108 126 132 154 167 189 198 231 252 297 308 334 378 396 462 501 594 668 693 756 924 1,002 1,169 1,188 1,386 1,503 1,837 2,004 2,079 2,338 2,772 3,006 3,507 3,674 4,158 4,509 4,676 5,511 6,012 7,014 7,348 8,316 9,018 10,521 11,022 12,859 14,028 16,533 18,036 21,042 22,044 25,718 31,563 33,066 38,577 42,084 49,599 51,436 63,126 66,132 77,154 99,198 115,731 126,252 154,308 198,396 231,462 347,193 462,924 694,386 and 1,388,772, with no remainder.
Since 1,388,772 cannot be divided by just 1 and 1,388,772, it is not a prime number.