The number 2,070,900 can be evenly divided by 1 2 3 4 5 6 9 10 12 13 15 18 20 25 26 27 30 36 39 45 50 52 54 59 60 65 75 78 90 100 108 117 118 130 135 150 156 177 180 195 225 234 236 260 270 295 300 325 351 354 390 450 468 531 540 585 590 650 675 702 708 767 780 885 900 975 1,062 1,170 1,180 1,300 1,350 1,404 1,475 1,534 1,593 1,755 1,770 1,950 2,124 2,301 2,340 2,655 2,700 2,925 2,950 3,068 3,186 3,510 3,540 3,835 3,900 4,425 4,602 5,310 5,850 5,900 6,372 6,903 7,020 7,670 7,965 8,775 8,850 9,204 10,620 11,505 11,700 13,275 13,806 15,340 15,930 17,550 17,700 19,175 20,709 23,010 26,550 27,612 31,860 34,515 35,100 38,350 39,825 41,418 46,020 53,100 57,525 69,030 76,700 79,650 82,836 103,545 115,050 138,060 159,300 172,575 207,090 230,100 345,150 414,180 517,725 690,300 1,035,450 and 2,070,900, with no remainder.
Since 2,070,900 cannot be divided by just 1 and 2,070,900, it is a composite number.