The number 1,115,400 can be evenly divided by 1 2 3 4 5 6 8 10 11 12 13 15 20 22 24 25 26 30 33 39 40 44 50 52 55 60 65 66 75 78 88 100 104 110 120 130 132 143 150 156 165 169 195 200 220 260 264 275 286 300 312 325 330 338 390 429 440 507 520 550 572 600 650 660 676 715 780 825 845 858 975 1,014 1,100 1,144 1,300 1,320 1,352 1,430 1,560 1,650 1,690 1,716 1,859 1,950 2,028 2,145 2,200 2,535 2,600 2,860 3,300 3,380 3,432 3,575 3,718 3,900 4,056 4,225 4,290 5,070 5,577 5,720 6,600 6,760 7,150 7,436 7,800 8,450 8,580 9,295 10,140 10,725 11,154 12,675 14,300 14,872 16,900 17,160 18,590 20,280 21,450 22,308 25,350 27,885 28,600 33,800 37,180 42,900 44,616 46,475 50,700 55,770 74,360 85,800 92,950 101,400 111,540 139,425 185,900 223,080 278,850 371,800 557,700 and 1,115,400, with no remainder.
Since 1,115,400 cannot be divided by just 1 and 1,115,400, it is a composite number.