A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2682000 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 25 30 36 40 45 48 50 60 72 75 80 90 100 120 125 144 149 150 180 200 225 240 250 298 300 360 375 400 447 450 500 596 600 720 745 750 894 900 1,000 1,125 1,192 1,200 1,341 1,490 1,500 1,788 1,800 2,000 2,235 2,250 2,384 2,682 2,980 3,000 3,576 3,600 3,725 4,470 4,500 5,364 5,960 6,000 6,705 7,152 7,450 8,940 9,000 10,728 11,175 11,920 13,410 14,900 17,880 18,000 18,625 21,456 22,350 26,820 29,800 33,525 35,760 37,250 44,700 53,640 55,875 59,600 67,050 74,500 89,400 107,280 111,750 134,100 149,000 167,625 178,800 223,500 268,200 298,000 335,250 447,000 536,400 670,500 894,000 1,341,000 and 2,682,000, with no remainder.
Since 2,682,000 cannot be divided by just 1 and 2,682,000, it is not a prime number.