The number 1,115,856 can be evenly divided by 1 2 3 4 6 7 8 9 12 14 16 18 21 24 27 28 36 41 42 48 54 56 63 72 81 82 84 108 112 123 126 144 162 164 168 189 216 243 246 252 287 324 328 336 369 378 432 486 492 504 567 574 648 656 738 756 861 972 984 1,008 1,107 1,134 1,148 1,296 1,476 1,512 1,701 1,722 1,944 1,968 2,214 2,268 2,296 2,583 2,952 3,024 3,321 3,402 3,444 3,888 4,428 4,536 4,592 5,166 5,904 6,642 6,804 6,888 7,749 8,856 9,072 9,963 10,332 13,284 13,608 13,776 15,498 17,712 19,926 20,664 23,247 26,568 27,216 30,996 39,852 41,328 46,494 53,136 61,992 69,741 79,704 92,988 123,984 139,482 159,408 185,976 278,964 371,952 557,928 and 1,115,856, with no remainder.
Since 1,115,856 cannot be divided by just 1 and 1,115,856, it is a composite number.