The number 1,309,770 can be evenly divided by 1 2 3 5 6 7 9 10 11 14 15 18 21 22 27 30 33 35 42 45 49 54 55 63 66 70 77 81 90 98 99 105 110 126 135 147 154 162 165 189 198 210 231 243 245 270 294 297 315 330 378 385 405 441 462 486 490 495 539 567 594 630 693 735 770 810 882 891 945 990 1,078 1,134 1,155 1,215 1,323 1,386 1,470 1,485 1,617 1,701 1,782 1,890 2,079 2,205 2,310 2,430 2,646 2,673 2,695 2,835 2,970 3,234 3,402 3,465 3,969 4,158 4,410 4,455 4,851 5,346 5,390 5,670 6,237 6,615 6,930 7,938 8,085 8,505 8,910 9,702 10,395 11,907 12,474 13,230 13,365 14,553 16,170 17,010 18,711 19,845 20,790 23,814 24,255 26,730 29,106 31,185 37,422 39,690 43,659 48,510 59,535 62,370 72,765 87,318 93,555 119,070 130,977 145,530 187,110 218,295 261,954 436,590 654,885 and 1,309,770, with no remainder.
Since 1,309,770 cannot be divided by just 1 and 1,309,770, it is a composite number.