The number 1,657,152 can be evenly divided by 1 2 3 4 6 7 8 9 12 14 16 18 21 24 27 28 32 36 42 48 54 56 63 64 72 84 96 108 112 126 137 144 168 189 192 216 224 252 274 288 336 378 411 432 448 504 548 576 672 756 822 864 959 1,008 1,096 1,233 1,344 1,512 1,644 1,728 1,918 2,016 2,192 2,466 2,877 3,024 3,288 3,699 3,836 4,032 4,384 4,932 5,754 6,048 6,576 7,398 7,672 8,631 8,768 9,864 11,508 12,096 13,152 14,796 15,344 17,262 19,728 23,016 25,893 26,304 29,592 30,688 34,524 39,456 46,032 51,786 59,184 61,376 69,048 78,912 92,064 103,572 118,368 138,096 184,128 207,144 236,736 276,192 414,288 552,384 828,576 and 1,657,152, with no remainder.
Since 1,657,152 cannot be divided by just 1 and 1,657,152, it is a composite number.