A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4050200 can be evenly divided by 1 2 4 5 7 8 10 11 14 20 22 25 28 35 40 44 50 55 56 70 77 88 100 110 140 154 175 200 220 263 275 280 308 350 385 440 526 550 616 700 770 1,052 1,100 1,315 1,400 1,540 1,841 1,925 2,104 2,200 2,630 2,893 3,080 3,682 3,850 5,260 5,786 6,575 7,364 7,700 9,205 10,520 11,572 13,150 14,465 14,728 15,400 18,410 20,251 23,144 26,300 28,930 36,820 40,502 46,025 52,600 57,860 72,325 73,640 81,004 92,050 101,255 115,720 144,650 162,008 184,100 202,510 289,300 368,200 405,020 506,275 578,600 810,040 1,012,550 2,025,100 and 4,050,200, with no remainder.
Since 4,050,200 cannot be divided by just 1 and 4,050,200, it is not a prime number.