The number 1,510,110 can be evenly divided by 1 2 3 5 6 7 9 10 14 15 17 18 21 27 30 34 35 42 45 47 51 54 63 70 85 90 94 102 105 119 126 135 141 153 170 189 210 235 238 255 270 282 306 315 329 357 378 423 459 470 510 595 630 658 705 714 765 799 846 918 945 987 1,071 1,190 1,269 1,410 1,530 1,598 1,645 1,785 1,890 1,974 2,115 2,142 2,295 2,397 2,538 2,961 3,213 3,290 3,570 3,995 4,230 4,590 4,794 4,935 5,355 5,593 5,922 6,345 6,426 7,191 7,990 8,883 9,870 10,710 11,186 11,985 12,690 14,382 14,805 16,065 16,779 17,766 21,573 23,970 27,965 29,610 32,130 33,558 35,955 43,146 44,415 50,337 55,930 71,910 83,895 88,830 100,674 107,865 151,011 167,790 215,730 251,685 302,022 503,370 755,055 and 1,510,110, with no remainder.
Since 1,510,110 cannot be divided by just 1 and 1,510,110, it is a composite number.