A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 1752600 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 20 23 24 25 30 40 46 50 60 69 75 92 100 115 120 127 138 150 184 200 230 254 276 300 345 381 460 508 552 575 600 635 690 762 920 1,016 1,150 1,270 1,380 1,524 1,725 1,905 2,300 2,540 2,760 2,921 3,048 3,175 3,450 3,810 4,600 5,080 5,842 6,350 6,900 7,620 8,763 9,525 11,684 12,700 13,800 14,605 15,240 17,526 19,050 23,368 25,400 29,210 35,052 38,100 43,815 58,420 70,104 73,025 76,200 87,630 116,840 146,050 175,260 219,075 292,100 350,520 438,150 584,200 876,300 and 1,752,600, with no remainder.
Since 1,752,600 cannot be divided by just 1 and 1,752,600, it is not a prime number.