A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3429000 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 18 20 24 25 27 30 36 40 45 50 54 60 72 75 90 100 108 120 125 127 135 150 180 200 216 225 250 254 270 300 360 375 381 450 500 508 540 600 635 675 750 762 900 1,000 1,016 1,080 1,125 1,143 1,270 1,350 1,500 1,524 1,800 1,905 2,250 2,286 2,540 2,700 3,000 3,048 3,175 3,375 3,429 3,810 4,500 4,572 5,080 5,400 5,715 6,350 6,750 6,858 7,620 9,000 9,144 9,525 11,430 12,700 13,500 13,716 15,240 15,875 17,145 19,050 22,860 25,400 27,000 27,432 28,575 31,750 34,290 38,100 45,720 47,625 57,150 63,500 68,580 76,200 85,725 95,250 114,300 127,000 137,160 142,875 171,450 190,500 228,600 285,750 342,900 381,000 428,625 571,500 685,800 857,250 1,143,000 1,714,500 and 3,429,000, with no remainder.
Since 3,429,000 cannot be divided by just 1 and 3,429,000, it is not a prime number.