The number 2,925,720 can be evenly divided by 1 2 3 4 5 6 7 8 9 10 12 14 15 18 20 21 24 27 28 30 35 36 40 42 43 45 54 56 60 63 70 72 81 84 86 90 105 108 120 126 129 135 140 162 168 172 180 189 210 215 216 243 252 258 270 280 301 315 324 344 360 378 387 405 420 430 486 504 516 540 567 602 630 645 648 756 774 810 840 860 903 945 972 1,032 1,080 1,134 1,161 1,204 1,215 1,260 1,290 1,505 1,512 1,548 1,620 1,701 1,720 1,806 1,890 1,935 1,944 2,268 2,322 2,408 2,430 2,520 2,580 2,709 2,835 3,010 3,096 3,240 3,402 3,483 3,612 3,780 3,870 4,515 4,536 4,644 4,860 5,160 5,418 5,670 5,805 6,020 6,804 6,966 7,224 7,560 7,740 8,127 8,505 9,030 9,288 9,720 10,449 10,836 11,340 11,610 12,040 13,545 13,608 13,932 15,480 16,254 17,010 17,415 18,060 20,898 21,672 22,680 23,220 24,381 27,090 27,864 32,508 34,020 34,830 36,120 40,635 41,796 46,440 48,762 52,245 54,180 65,016 68,040 69,660 73,143 81,270 83,592 97,524 104,490 108,360 121,905 139,320 146,286 162,540 195,048 208,980 243,810 292,572 325,080 365,715 417,960 487,620 585,144 731,430 975,240 1,462,860 and 2,925,720, with no remainder.
Since 2,925,720 cannot be divided by just 1 and 2,925,720, it is a composite number.