The number 3,725,568 can be evenly divided by 1 2 3 4 6 7 8 9 11 12 14 16 18 21 22 24 27 28 32 33 36 42 44 48 49 54 56 63 64 66 72 77 84 88 96 98 99 108 112 126 128 132 144 147 154 168 176 189 192 196 198 216 224 231 252 256 264 288 294 297 308 336 352 378 384 392 396 432 441 448 462 504 528 539 576 588 594 616 672 693 704 756 768 784 792 864 882 896 924 1,008 1,056 1,078 1,152 1,176 1,188 1,232 1,323 1,344 1,386 1,408 1,512 1,568 1,584 1,617 1,728 1,764 1,792 1,848 2,016 2,079 2,112 2,156 2,304 2,352 2,376 2,464 2,646 2,688 2,772 2,816 3,024 3,136 3,168 3,234 3,456 3,528 3,696 4,032 4,158 4,224 4,312 4,704 4,752 4,851 4,928 5,292 5,376 5,544 6,048 6,272 6,336 6,468 6,912 7,056 7,392 8,064 8,316 8,448 8,624 9,408 9,504 9,702 9,856 10,584 11,088 12,096 12,544 12,672 12,936 14,112 14,553 14,784 16,128 16,632 17,248 18,816 19,008 19,404 19,712 21,168 22,176 24,192 25,344 25,872 28,224 29,106 29,568 33,264 34,496 37,632 38,016 38,808 42,336 44,352 48,384 51,744 56,448 58,212 59,136 66,528 68,992 76,032 77,616 84,672 88,704 103,488 112,896 116,424 133,056 137,984 155,232 169,344 177,408 206,976 232,848 266,112 310,464 338,688 413,952 465,696 532,224 620,928 931,392 1,241,856 1,862,784 and 3,725,568, with no remainder.
Since 3,725,568 cannot be divided by just 1 and 3,725,568, it is a composite number.