A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2470000 can be evenly divided by 1 2 4 5 8 10 13 16 19 20 25 26 38 40 50 52 65 76 80 95 100 104 125 130 152 190 200 208 247 250 260 304 325 380 400 475 494 500 520 625 650 760 950 988 1,000 1,040 1,235 1,250 1,300 1,520 1,625 1,900 1,976 2,000 2,375 2,470 2,500 2,600 3,250 3,800 3,952 4,750 4,940 5,000 5,200 6,175 6,500 7,600 8,125 9,500 9,880 10,000 11,875 12,350 13,000 16,250 19,000 19,760 23,750 24,700 26,000 30,875 32,500 38,000 47,500 49,400 61,750 65,000 95,000 98,800 123,500 130,000 154,375 190,000 247,000 308,750 494,000 617,500 1,235,000 and 2,470,000, with no remainder.
Since 2,470,000 cannot be divided by just 1 and 2,470,000, it is not a prime number.