The number 1,874,340 can be evenly divided by 1 2 3 4 5 6 9 10 12 13 15 18 20 26 27 30 36 39 45 52 54 60 65 78 81 89 90 108 117 130 135 156 162 178 180 195 234 260 267 270 324 351 356 390 405 445 468 534 540 585 702 780 801 810 890 1,053 1,068 1,157 1,170 1,335 1,404 1,602 1,620 1,755 1,780 2,106 2,314 2,340 2,403 2,670 3,204 3,471 3,510 4,005 4,212 4,628 4,806 5,265 5,340 5,785 6,942 7,020 7,209 8,010 9,612 10,413 10,530 11,570 12,015 13,884 14,418 16,020 17,355 20,826 21,060 23,140 24,030 28,836 31,239 34,710 36,045 41,652 48,060 52,065 62,478 69,420 72,090 93,717 104,130 124,956 144,180 156,195 187,434 208,260 312,390 374,868 468,585 624,780 937,170 and 1,874,340, with no remainder.
Since 1,874,340 cannot be divided by just 1 and 1,874,340, it is a composite number.