The number 3,517,020 can be evenly divided by 1 2 3 4 5 6 9 10 12 13 15 18 20 26 27 30 36 39 45 52 54 60 65 78 81 90 108 117 130 135 156 162 167 180 195 234 260 270 324 334 351 390 405 468 501 540 585 668 702 780 810 835 1,002 1,053 1,170 1,404 1,503 1,620 1,670 1,755 2,004 2,106 2,171 2,340 2,505 3,006 3,340 3,510 4,212 4,342 4,509 5,010 5,265 6,012 6,513 7,020 7,515 8,684 9,018 10,020 10,530 10,855 13,026 13,527 15,030 18,036 19,539 21,060 21,710 22,545 26,052 27,054 30,060 32,565 39,078 43,420 45,090 54,108 58,617 65,130 67,635 78,156 90,180 97,695 117,234 130,260 135,270 175,851 195,390 234,468 270,540 293,085 351,702 390,780 586,170 703,404 879,255 1,172,340 1,758,510 and 3,517,020, with no remainder.
Since 3,517,020 cannot be divided by just 1 and 3,517,020, it is a composite number.