The number 3,225,060 can be evenly divided by 1 2 3 4 5 6 9 10 12 15 18 19 20 23 30 36 38 41 45 46 57 60 69 76 82 90 92 95 114 115 123 138 164 171 180 190 205 207 228 230 246 276 285 342 345 369 380 410 414 437 460 492 570 615 684 690 738 779 820 828 855 874 943 1,035 1,140 1,230 1,311 1,380 1,476 1,558 1,710 1,748 1,845 1,886 2,070 2,185 2,337 2,460 2,622 2,829 3,116 3,420 3,690 3,772 3,895 3,933 4,140 4,370 4,674 4,715 5,244 5,658 6,555 7,011 7,380 7,790 7,866 8,487 8,740 9,348 9,430 11,316 11,685 13,110 14,022 14,145 15,580 15,732 16,974 17,917 18,860 19,665 23,370 26,220 28,044 28,290 33,948 35,055 35,834 39,330 42,435 46,740 53,751 56,580 70,110 71,668 78,660 84,870 89,585 107,502 140,220 161,253 169,740 179,170 215,004 268,755 322,506 358,340 537,510 645,012 806,265 1,075,020 1,612,530 and 3,225,060, with no remainder.
Since 3,225,060 cannot be divided by just 1 and 3,225,060, it is a composite number.