The number 1,333,800 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 13 15 18 19 20 24 25 26 27 30 36 38 39 40 45 50 52 54 57 60 65 72 75 76 78 90 95 100 104 108 114 117 120 130 135 150 152 156 171 180 190 195 200 216 225 228 234 247 260 270 285 300 312 325 342 351 360 380 390 450 456 468 475 494 513 520 540 570 585 600 650 675 684 702 741 760 780 855 900 936 950 975 988 1,026 1,080 1,140 1,170 1,235 1,300 1,350 1,368 1,404 1,425 1,482 1,560 1,710 1,755 1,800 1,900 1,950 1,976 2,052 2,223 2,280 2,340 2,470 2,565 2,600 2,700 2,808 2,850 2,925 2,964 3,420 3,510 3,705 3,800 3,900 4,104 4,275 4,446 4,680 4,940 5,130 5,400 5,700 5,850 5,928 6,175 6,669 6,840 7,020 7,410 7,800 8,550 8,775 8,892 9,880 10,260 11,115 11,400 11,700 12,350 12,825 13,338 14,040 14,820 17,100 17,550 17,784 18,525 20,520 22,230 23,400 24,700 25,650 26,676 29,640 33,345 34,200 35,100 37,050 44,460 49,400 51,300 53,352 55,575 66,690 70,200 74,100 88,920 102,600 111,150 133,380 148,200 166,725 222,300 266,760 333,450 444,600 666,900 and 1,333,800, with no remainder.
Since 1,333,800 cannot be divided by just 1 and 1,333,800, it is a composite number.