A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 6247080 can be evenly divided by 1 2 3 4 5 6 7 8 9 10 12 14 15 18 20 21 24 28 30 35 36 37 40 42 45 56 60 63 67 70 72 74 84 90 105 111 120 126 134 140 148 168 180 185 201 210 222 252 259 268 280 296 315 333 335 360 370 402 420 444 469 504 518 536 555 603 630 666 670 740 777 804 840 888 938 1,005 1,036 1,110 1,206 1,260 1,295 1,332 1,340 1,407 1,480 1,554 1,608 1,665 1,876 2,010 2,072 2,220 2,331 2,345 2,412 2,479 2,520 2,590 2,664 2,680 2,814 3,015 3,108 3,330 3,752 3,885 4,020 4,221 4,440 4,662 4,690 4,824 4,958 5,180 5,628 6,030 6,216 6,660 7,035 7,437 7,770 8,040 8,442 9,324 9,380 9,916 10,360 11,256 11,655 12,060 12,395 13,320 14,070 14,874 15,540 16,884 17,353 18,648 18,760 19,832 21,105 22,311 23,310 24,120 24,790 28,140 29,748 31,080 33,768 34,706 37,185 42,210 44,622 46,620 49,580 52,059 56,280 59,496 69,412 74,370 84,420 86,765 89,244 93,240 99,160 104,118 111,555 138,824 148,740 156,177 168,840 173,530 178,488 208,236 223,110 260,295 297,480 312,354 347,060 416,472 446,220 520,590 624,708 694,120 780,885 892,440 1,041,180 1,249,416 1,561,770 2,082,360 3,123,540 and 6,247,080, with no remainder.
Since 6,247,080 cannot be divided by just 1 and 6,247,080, it is not a prime number.