The number 745,920 can be evenly divided by 1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 20 21 24 28 30 32 35 36 37 40 42 45 48 56 60 63 64 70 72 74 80 84 90 96 105 111 112 120 126 140 144 148 160 168 180 185 192 210 222 224 240 252 259 280 288 296 315 320 333 336 360 370 420 444 448 480 504 518 555 560 576 592 630 666 672 720 740 777 840 888 960 1,008 1,036 1,110 1,120 1,184 1,260 1,295 1,332 1,344 1,440 1,480 1,554 1,665 1,680 1,776 2,016 2,072 2,220 2,240 2,331 2,368 2,520 2,590 2,664 2,880 2,960 3,108 3,330 3,360 3,552 3,885 4,032 4,144 4,440 4,662 5,040 5,180 5,328 5,920 6,216 6,660 6,720 7,104 7,770 8,288 8,880 9,324 10,080 10,360 10,656 11,655 11,840 12,432 13,320 15,540 16,576 17,760 18,648 20,160 20,720 21,312 23,310 24,864 26,640 31,080 35,520 37,296 41,440 46,620 49,728 53,280 62,160 74,592 82,880 93,240 106,560 124,320 149,184 186,480 248,640 372,960 and 745,920, with no remainder.
Since 745,920 cannot be divided by just 1 and 745,920, it is a composite number.