A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 1127610 can be evenly divided by 1 2 3 5 6 9 10 11 15 17 18 22 30 33 34 45 51 55 66 67 85 90 99 102 110 134 153 165 170 187 198 201 255 306 330 335 374 402 495 510 561 603 670 737 765 935 990 1,005 1,122 1,139 1,206 1,474 1,530 1,683 1,870 2,010 2,211 2,278 2,805 3,015 3,366 3,417 3,685 4,422 5,610 5,695 6,030 6,633 6,834 7,370 8,415 10,251 11,055 11,390 12,529 13,266 16,830 17,085 20,502 22,110 25,058 33,165 34,170 37,587 51,255 62,645 66,330 75,174 102,510 112,761 125,290 187,935 225,522 375,870 563,805 and 1,127,610, with no remainder.
Since 1,127,610 cannot be divided by just 1 and 1,127,610, it is not a prime number.