The number 1,747,200 can be evenly divided by 1 2 3 4 5 6 7 8 10 12 13 14 15 16 20 21 24 25 26 28 30 32 35 39 40 42 48 50 52 56 60 64 65 70 75 78 80 84 91 96 100 104 105 112 120 128 130 140 150 156 160 168 175 182 192 195 200 208 210 224 240 256 260 273 280 300 312 320 325 336 350 364 384 390 400 416 420 448 455 480 520 525 546 560 600 624 640 650 672 700 728 768 780 800 832 840 896 910 960 975 1,040 1,050 1,092 1,120 1,200 1,248 1,280 1,300 1,344 1,365 1,400 1,456 1,560 1,600 1,664 1,680 1,792 1,820 1,920 1,950 2,080 2,100 2,184 2,240 2,275 2,400 2,496 2,600 2,688 2,730 2,800 2,912 3,120 3,200 3,328 3,360 3,640 3,840 3,900 4,160 4,200 4,368 4,480 4,550 4,800 4,992 5,200 5,376 5,460 5,600 5,824 6,240 6,400 6,720 6,825 7,280 7,800 8,320 8,400 8,736 8,960 9,100 9,600 9,984 10,400 10,920 11,200 11,648 12,480 13,440 13,650 14,560 15,600 16,640 16,800 17,472 18,200 19,200 20,800 21,840 22,400 23,296 24,960 26,880 27,300 29,120 31,200 33,600 34,944 36,400 41,600 43,680 44,800 49,920 54,600 58,240 62,400 67,200 69,888 72,800 83,200 87,360 109,200 116,480 124,800 134,400 145,600 174,720 218,400 249,600 291,200 349,440 436,800 582,400 873,600 and 1,747,200, with no remainder.
Since 1,747,200 cannot be divided by just 1 and 1,747,200, it is a composite number.