A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2530710 can be evenly divided by 1 2 3 5 6 7 9 10 13 14 15 18 21 26 27 30 35 39 42 45 54 63 65 70 78 90 91 103 105 117 126 130 135 182 189 195 206 210 234 270 273 309 315 351 378 390 455 515 546 585 618 630 702 721 819 910 927 945 1,030 1,170 1,339 1,365 1,442 1,545 1,638 1,755 1,854 1,890 2,163 2,457 2,678 2,730 2,781 3,090 3,510 3,605 4,017 4,095 4,326 4,635 4,914 5,562 6,489 6,695 7,210 8,034 8,190 9,270 9,373 10,815 12,051 12,285 12,978 13,390 13,905 18,746 19,467 20,085 21,630 24,102 24,570 27,810 28,119 32,445 36,153 38,934 40,170 46,865 56,238 60,255 64,890 72,306 84,357 93,730 97,335 120,510 140,595 168,714 180,765 194,670 253,071 281,190 361,530 421,785 506,142 843,570 1,265,355 and 2,530,710, with no remainder.
Since 2,530,710 cannot be divided by just 1 and 2,530,710, it is not a prime number.