The number 1,246,752 can be evenly divided by 1 2 3 4 6 8 9 12 13 16 18 24 26 27 32 36 37 39 48 52 54 72 74 78 81 96 104 108 111 117 144 148 156 162 208 216 222 234 288 296 312 324 333 351 416 432 444 468 481 592 624 648 666 702 864 888 936 962 999 1,053 1,184 1,248 1,296 1,332 1,404 1,443 1,776 1,872 1,924 1,998 2,106 2,592 2,664 2,808 2,886 2,997 3,552 3,744 3,848 3,996 4,212 4,329 5,328 5,616 5,772 5,994 7,696 7,992 8,424 8,658 10,656 11,232 11,544 11,988 12,987 15,392 15,984 16,848 17,316 23,088 23,976 25,974 31,968 33,696 34,632 38,961 46,176 47,952 51,948 69,264 77,922 95,904 103,896 138,528 155,844 207,792 311,688 415,584 623,376 and 1,246,752, with no remainder.
Since 1,246,752 cannot be divided by just 1 and 1,246,752, it is a composite number.