The number 1,571,760 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 30 36 37 40 45 48 59 60 72 74 80 90 111 118 120 144 148 177 180 185 222 236 240 295 296 333 354 360 370 444 472 531 555 590 592 666 708 720 740 885 888 944 1,062 1,110 1,180 1,332 1,416 1,480 1,665 1,770 1,776 2,124 2,183 2,220 2,360 2,655 2,664 2,832 2,960 3,330 3,540 4,248 4,366 4,440 4,720 5,310 5,328 6,549 6,660 7,080 8,496 8,732 8,880 10,620 10,915 13,098 13,320 14,160 17,464 19,647 21,240 21,830 26,196 26,640 32,745 34,928 39,294 42,480 43,660 52,392 65,490 78,588 87,320 98,235 104,784 130,980 157,176 174,640 196,470 261,960 314,352 392,940 523,920 785,880 and 1,571,760, with no remainder.
Since 1,571,760 cannot be divided by just 1 and 1,571,760, it is a composite number.