A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2970000 can be evenly divided by 1 2 3 4 5 6 8 9 10 11 12 15 16 18 20 22 24 25 27 30 33 36 40 44 45 48 50 54 55 60 66 72 75 80 88 90 99 100 108 110 120 125 132 135 144 150 165 176 180 198 200 216 220 225 240 250 264 270 275 297 300 330 360 375 396 400 432 440 450 495 500 528 540 550 594 600 625 660 675 720 750 792 825 880 900 990 1,000 1,080 1,100 1,125 1,188 1,200 1,250 1,320 1,350 1,375 1,485 1,500 1,584 1,650 1,800 1,875 1,980 2,000 2,160 2,200 2,250 2,376 2,475 2,500 2,640 2,700 2,750 2,970 3,000 3,300 3,375 3,600 3,750 3,960 4,125 4,400 4,500 4,752 4,950 5,000 5,400 5,500 5,625 5,940 6,000 6,600 6,750 6,875 7,425 7,500 7,920 8,250 9,000 9,900 10,000 10,800 11,000 11,250 11,880 12,375 13,200 13,500 13,750 14,850 15,000 16,500 16,875 18,000 19,800 20,625 22,000 22,500 23,760 24,750 27,000 27,500 29,700 30,000 33,000 33,750 37,125 39,600 41,250 45,000 49,500 54,000 55,000 59,400 61,875 66,000 67,500 74,250 82,500 90,000 99,000 110,000 118,800 123,750 135,000 148,500 165,000 185,625 198,000 247,500 270,000 297,000 330,000 371,250 495,000 594,000 742,500 990,000 1,485,000 and 2,970,000, with no remainder.
Since 2,970,000 cannot be divided by just 1 and 2,970,000, it is not a prime number.