The number 1,981,320 can be evenly divided by 1 2 3 4 5 6 8 10 11 12 15 19 20 22 24 30 33 38 40 44 55 57 60 66 76 79 88 95 110 114 120 132 152 158 165 190 209 220 228 237 264 285 316 330 380 395 418 440 456 474 570 627 632 660 760 790 836 869 948 1,045 1,140 1,185 1,254 1,320 1,501 1,580 1,672 1,738 1,896 2,090 2,280 2,370 2,508 2,607 3,002 3,135 3,160 3,476 4,180 4,345 4,503 4,740 5,016 5,214 6,004 6,270 6,952 7,505 8,360 8,690 9,006 9,480 10,428 12,008 12,540 13,035 15,010 16,511 17,380 18,012 20,856 22,515 25,080 26,070 30,020 33,022 34,760 36,024 45,030 49,533 52,140 60,040 66,044 82,555 90,060 99,066 104,280 132,088 165,110 180,120 198,132 247,665 330,220 396,264 495,330 660,440 990,660 and 1,981,320, with no remainder.
Since 1,981,320 cannot be divided by just 1 and 1,981,320, it is a composite number.