The number 1,309,176 can be evenly divided by 1 2 3 4 6 8 9 11 12 18 19 22 24 27 29 33 36 38 44 54 57 58 66 72 76 87 88 99 108 114 116 132 152 171 174 198 209 216 228 232 261 264 297 319 342 348 396 418 456 513 522 551 594 627 638 684 696 783 792 836 957 1,026 1,044 1,102 1,188 1,254 1,276 1,368 1,566 1,653 1,672 1,881 1,914 2,052 2,088 2,204 2,376 2,508 2,552 2,871 3,132 3,306 3,762 3,828 4,104 4,408 4,959 5,016 5,643 5,742 6,061 6,264 6,612 7,524 7,656 8,613 9,918 11,286 11,484 12,122 13,224 14,877 15,048 17,226 18,183 19,836 22,572 22,968 24,244 29,754 34,452 36,366 39,672 45,144 48,488 54,549 59,508 68,904 72,732 109,098 119,016 145,464 163,647 218,196 327,294 436,392 654,588 and 1,309,176, with no remainder.
Since 1,309,176 cannot be divided by just 1 and 1,309,176, it is a composite number.