The number 1,654,848 can be evenly divided by 1 2 3 4 6 8 9 12 13 16 17 18 24 26 32 34 36 39 48 51 52 64 68 72 78 96 102 104 117 136 144 153 156 169 192 204 208 221 234 272 288 306 312 338 408 416 442 468 507 544 576 612 624 663 676 816 832 884 936 1,014 1,088 1,224 1,248 1,326 1,352 1,521 1,632 1,768 1,872 1,989 2,028 2,448 2,496 2,652 2,704 2,873 3,042 3,264 3,536 3,744 3,978 4,056 4,896 5,304 5,408 5,746 6,084 7,072 7,488 7,956 8,112 8,619 9,792 10,608 10,816 11,492 12,168 14,144 15,912 16,224 17,238 21,216 22,984 24,336 25,857 31,824 32,448 34,476 42,432 45,968 48,672 51,714 63,648 68,952 91,936 97,344 103,428 127,296 137,904 183,872 206,856 275,808 413,712 551,616 827,424 and 1,654,848, with no remainder.
Since 1,654,848 cannot be divided by just 1 and 1,654,848, it is a composite number.