The number 1,263,360 can be evenly divided by 1 2 3 4 5 6 7 8 10 12 14 15 16 20 21 24 28 30 32 35 40 42 47 48 56 60 64 70 80 84 94 96 105 112 120 128 140 141 160 168 188 192 210 224 235 240 256 280 282 320 329 336 376 384 420 448 470 480 560 564 640 658 672 705 752 768 840 896 940 960 987 1,120 1,128 1,280 1,316 1,344 1,410 1,504 1,645 1,680 1,792 1,880 1,920 1,974 2,240 2,256 2,632 2,688 2,820 3,008 3,290 3,360 3,760 3,840 3,948 4,480 4,512 4,935 5,264 5,376 5,640 6,016 6,580 6,720 7,520 7,896 8,960 9,024 9,870 10,528 11,280 12,032 13,160 13,440 15,040 15,792 18,048 19,740 21,056 22,560 26,320 26,880 30,080 31,584 36,096 39,480 42,112 45,120 52,640 60,160 63,168 78,960 84,224 90,240 105,280 126,336 157,920 180,480 210,560 252,672 315,840 421,120 631,680 and 1,263,360, with no remainder.
Since 1,263,360 cannot be divided by just 1 and 1,263,360, it is a composite number.