The number 6,450,192 can be evenly divided by 1 2 3 4 6 7 8 9 12 14 16 18 21 24 27 28 36 42 48 54 56 63 72 79 81 84 108 112 126 144 158 162 168 189 216 237 243 252 316 324 336 378 432 474 486 504 553 567 632 648 711 729 756 948 972 1,008 1,106 1,134 1,264 1,296 1,422 1,458 1,512 1,659 1,701 1,896 1,944 2,133 2,212 2,268 2,844 2,916 3,024 3,318 3,402 3,792 3,888 4,266 4,424 4,536 4,977 5,103 5,688 5,832 6,399 6,636 6,804 8,532 8,848 9,072 9,954 10,206 11,376 11,664 12,798 13,272 13,608 14,931 17,064 19,197 19,908 20,412 25,596 26,544 27,216 29,862 34,128 38,394 39,816 40,824 44,793 51,192 57,591 59,724 76,788 79,632 81,648 89,586 102,384 115,182 119,448 134,379 153,576 179,172 230,364 238,896 268,758 307,152 358,344 403,137 460,728 537,516 716,688 806,274 921,456 1,075,032 1,612,548 2,150,064 3,225,096 and 6,450,192, with no remainder.
Since 6,450,192 cannot be divided by just 1 and 6,450,192, it is a composite number.