The number 1,465,128 can be evenly divided by 1 2 3 4 6 7 8 9 12 14 17 18 19 21 24 27 28 34 36 38 42 51 54 56 57 63 68 72 76 81 84 102 108 114 119 126 133 136 152 153 162 168 171 189 204 216 228 238 252 266 306 323 324 342 357 378 399 408 456 459 476 504 513 532 567 612 646 648 684 714 756 798 918 952 969 1,026 1,064 1,071 1,134 1,197 1,224 1,292 1,368 1,377 1,428 1,512 1,539 1,596 1,836 1,938 2,052 2,142 2,261 2,268 2,394 2,584 2,754 2,856 2,907 3,078 3,192 3,213 3,591 3,672 3,876 4,104 4,284 4,522 4,536 4,788 5,508 5,814 6,156 6,426 6,783 7,182 7,752 8,568 8,721 9,044 9,576 9,639 10,773 11,016 11,628 12,312 12,852 13,566 14,364 17,442 18,088 19,278 20,349 21,546 23,256 25,704 26,163 27,132 28,728 34,884 38,556 40,698 43,092 52,326 54,264 61,047 69,768 77,112 81,396 86,184 104,652 122,094 162,792 183,141 209,304 244,188 366,282 488,376 732,564 and 1,465,128, with no remainder.
Since 1,465,128 cannot be divided by just 1 and 1,465,128, it is a composite number.