A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4149000 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 18 20 24 25 30 36 40 45 50 60 72 75 90 100 120 125 150 180 200 225 250 300 360 375 450 461 500 600 750 900 922 1,000 1,125 1,383 1,500 1,800 1,844 2,250 2,305 2,766 3,000 3,688 4,149 4,500 4,610 5,532 6,915 8,298 9,000 9,220 11,064 11,525 13,830 16,596 18,440 20,745 23,050 27,660 33,192 34,575 41,490 46,100 55,320 57,625 69,150 82,980 92,200 103,725 115,250 138,300 165,960 172,875 207,450 230,500 276,600 345,750 414,900 461,000 518,625 691,500 829,800 1,037,250 1,383,000 2,074,500 and 4,149,000, with no remainder.
Since 4,149,000 cannot be divided by just 1 and 4,149,000, it is not a prime number.