A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 1127160 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 18 20 24 30 31 36 40 45 60 62 72 90 93 101 120 124 155 180 186 202 248 279 303 310 360 372 404 465 505 558 606 620 744 808 909 930 1,010 1,116 1,212 1,240 1,395 1,515 1,818 1,860 2,020 2,232 2,424 2,790 3,030 3,131 3,636 3,720 4,040 4,545 5,580 6,060 6,262 7,272 9,090 9,393 11,160 12,120 12,524 15,655 18,180 18,786 25,048 28,179 31,310 36,360 37,572 46,965 56,358 62,620 75,144 93,930 112,716 125,240 140,895 187,860 225,432 281,790 375,720 563,580 and 1,127,160, with no remainder.
Since 1,127,160 cannot be divided by just 1 and 1,127,160, it is not a prime number.