The number 9,645,426 can be evenly divided by 1 2 3 6 7 9 14 17 18 19 21 27 34 38 42 51 54 57 63 79 102 114 119 126 133 153 158 171 189 237 238 266 306 323 342 357 378 399 459 474 513 553 646 711 714 798 918 969 1,026 1,071 1,106 1,197 1,343 1,422 1,501 1,659 1,938 2,133 2,142 2,261 2,394 2,686 2,907 3,002 3,213 3,318 3,591 4,029 4,266 4,503 4,522 4,977 5,814 6,426 6,783 7,182 8,058 8,721 9,006 9,401 9,954 10,507 12,087 13,509 13,566 14,931 17,442 18,802 20,349 21,014 24,174 25,517 27,018 28,203 29,862 31,521 36,261 40,527 40,698 51,034 56,406 61,047 63,042 72,522 76,551 81,054 84,609 94,563 122,094 153,102 169,218 178,619 189,126 229,653 253,827 283,689 357,238 459,306 507,654 535,857 567,378 688,959 1,071,714 1,377,918 1,607,571 3,215,142 4,822,713 and 9,645,426, with no remainder.
Since 9,645,426 cannot be divided by just 1 and 9,645,426, it is a composite number.