A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2614950 can be evenly divided by 1 2 3 5 6 9 10 13 15 18 25 26 27 30 39 45 50 54 65 75 78 90 117 130 135 149 150 195 225 234 270 298 325 351 390 447 450 585 650 675 702 745 894 975 1,170 1,341 1,350 1,490 1,755 1,937 1,950 2,235 2,682 2,925 3,510 3,725 3,874 4,023 4,470 5,811 5,850 6,705 7,450 8,046 8,775 9,685 11,175 11,622 13,410 17,433 17,550 19,370 20,115 22,350 29,055 33,525 34,866 40,230 48,425 52,299 58,110 67,050 87,165 96,850 100,575 104,598 145,275 174,330 201,150 261,495 290,550 435,825 522,990 871,650 1,307,475 and 2,614,950, with no remainder.
Since 2,614,950 cannot be divided by just 1 and 2,614,950, it is not a prime number.