A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5054280 can be evenly divided by 1 2 3 4 5 6 7 8 10 11 12 14 15 20 21 22 24 28 30 33 35 40 42 44 55 56 60 66 70 77 84 88 105 110 120 132 140 154 165 168 210 220 231 264 280 308 330 385 420 440 462 547 616 660 770 840 924 1,094 1,155 1,320 1,540 1,641 1,848 2,188 2,310 2,735 3,080 3,282 3,829 4,376 4,620 5,470 6,017 6,564 7,658 8,205 9,240 10,940 11,487 12,034 13,128 15,316 16,410 18,051 19,145 21,880 22,974 24,068 30,085 30,632 32,820 36,102 38,290 42,119 45,948 48,136 57,435 60,170 65,640 72,204 76,580 84,238 90,255 91,896 114,870 120,340 126,357 144,408 153,160 168,476 180,510 210,595 229,740 240,680 252,714 336,952 361,020 421,190 459,480 505,428 631,785 722,040 842,380 1,010,856 1,263,570 1,684,760 2,527,140 and 5,054,280, with no remainder.
Since 5,054,280 cannot be divided by just 1 and 5,054,280, it is not a prime number.