A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4235000 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 88 100 110 121 125 140 154 175 200 220 242 250 275 280 308 350 385 440 484 500 550 605 616 625 700 770 847 875 968 1,000 1,100 1,210 1,250 1,375 1,400 1,540 1,694 1,750 1,925 2,200 2,420 2,500 2,750 3,025 3,080 3,388 3,500 3,850 4,235 4,375 4,840 5,000 5,500 6,050 6,776 6,875 7,000 7,700 8,470 8,750 9,625 11,000 12,100 13,750 15,125 15,400 16,940 17,500 19,250 21,175 24,200 27,500 30,250 33,880 35,000 38,500 42,350 48,125 55,000 60,500 75,625 77,000 84,700 96,250 105,875 121,000 151,250 169,400 192,500 211,750 302,500 385,000 423,500 529,375 605,000 847,000 1,058,750 2,117,500 and 4,235,000, with no remainder.
Since 4,235,000 cannot be divided by just 1 and 4,235,000, it is not a prime number.