The number 1,279,080 can be evenly divided by 1 2 3 4 5 6 8 9 10 11 12 15 17 18 19 20 22 24 30 33 34 36 38 40 44 45 51 55 57 60 66 68 72 76 85 88 90 95 99 102 110 114 120 132 136 152 153 165 170 171 180 187 190 198 204 209 220 228 255 264 285 306 323 330 340 342 360 374 380 396 408 418 440 456 495 510 561 570 612 627 646 660 680 684 748 760 765 792 836 855 935 969 990 1,020 1,045 1,122 1,140 1,224 1,254 1,292 1,320 1,368 1,496 1,530 1,615 1,672 1,683 1,710 1,870 1,881 1,938 1,980 2,040 2,090 2,244 2,280 2,508 2,584 2,805 2,907 3,060 3,135 3,230 3,366 3,420 3,553 3,740 3,762 3,876 3,960 4,180 4,488 4,845 5,016 5,610 5,814 6,120 6,270 6,460 6,732 6,840 7,106 7,480 7,524 7,752 8,360 8,415 9,405 9,690 10,659 11,220 11,628 12,540 12,920 13,464 14,212 14,535 15,048 16,830 17,765 18,810 19,380 21,318 22,440 23,256 25,080 28,424 29,070 31,977 33,660 35,530 37,620 38,760 42,636 53,295 58,140 63,954 67,320 71,060 75,240 85,272 106,590 116,280 127,908 142,120 159,885 213,180 255,816 319,770 426,360 639,540 and 1,279,080, with no remainder.
Since 1,279,080 cannot be divided by just 1 and 1,279,080, it is a composite number.