The number 6,394,752 can be evenly divided by 1 2 3 4 6 7 8 9 12 13 14 16 18 21 24 26 28 32 36 39 42 48 52 56 61 63 64 72 78 84 91 96 104 112 117 122 126 128 144 156 168 182 183 192 208 224 234 244 252 273 288 312 336 364 366 384 416 427 448 468 488 504 546 549 576 624 672 728 732 793 819 832 854 896 936 976 1,008 1,092 1,098 1,152 1,248 1,281 1,344 1,456 1,464 1,586 1,638 1,664 1,708 1,872 1,952 2,016 2,184 2,196 2,379 2,496 2,562 2,688 2,912 2,928 3,172 3,276 3,416 3,744 3,843 3,904 4,032 4,368 4,392 4,758 4,992 5,124 5,551 5,824 5,856 6,344 6,552 6,832 7,137 7,488 7,686 7,808 8,064 8,736 8,784 9,516 10,248 11,102 11,648 11,712 12,688 13,104 13,664 14,274 14,976 15,372 16,653 17,472 17,568 19,032 20,496 22,204 23,424 25,376 26,208 27,328 28,548 30,744 33,306 34,944 35,136 38,064 40,992 44,408 49,959 50,752 52,416 54,656 57,096 61,488 66,612 70,272 76,128 81,984 88,816 99,918 101,504 104,832 114,192 122,976 133,224 152,256 163,968 177,632 199,836 228,384 245,952 266,448 304,512 355,264 399,672 456,768 491,904 532,896 710,528 799,344 913,536 1,065,792 1,598,688 2,131,584 3,197,376 and 6,394,752, with no remainder.
Since 6,394,752 cannot be divided by just 1 and 6,394,752, it is a composite number.