A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4054200 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 20 24 25 29 30 40 50 58 60 75 87 100 116 120 145 150 174 200 232 233 290 300 348 435 466 580 600 696 699 725 870 932 1,160 1,165 1,398 1,450 1,740 1,864 2,175 2,330 2,796 2,900 3,480 3,495 4,350 4,660 5,592 5,800 5,825 6,757 6,990 8,700 9,320 11,650 13,514 13,980 17,400 17,475 20,271 23,300 27,028 27,960 33,785 34,950 40,542 46,600 54,056 67,570 69,900 81,084 101,355 135,140 139,800 162,168 168,925 202,710 270,280 337,850 405,420 506,775 675,700 810,840 1,013,550 1,351,400 2,027,100 and 4,054,200, with no remainder.
Since 4,054,200 cannot be divided by just 1 and 4,054,200, it is not a prime number.