A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3540000 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 20 24 25 30 32 40 48 50 59 60 75 80 96 100 118 120 125 150 160 177 200 236 240 250 295 300 354 375 400 472 480 500 590 600 625 708 750 800 885 944 1,000 1,180 1,200 1,250 1,416 1,475 1,500 1,770 1,875 1,888 2,000 2,360 2,400 2,500 2,832 2,950 3,000 3,540 3,750 4,000 4,425 4,720 5,000 5,664 5,900 6,000 7,080 7,375 7,500 8,850 9,440 10,000 11,800 12,000 14,160 14,750 15,000 17,700 20,000 22,125 23,600 28,320 29,500 30,000 35,400 36,875 44,250 47,200 59,000 60,000 70,800 73,750 88,500 110,625 118,000 141,600 147,500 177,000 221,250 236,000 295,000 354,000 442,500 590,000 708,000 885,000 1,180,000 1,770,000 and 3,540,000, with no remainder.
Since 3,540,000 cannot be divided by just 1 and 3,540,000, it is not a prime number.