A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 1714500 can be evenly divided by 1 2 3 4 5 6 9 10 12 15 18 20 25 27 30 36 45 50 54 60 75 90 100 108 125 127 135 150 180 225 250 254 270 300 375 381 450 500 508 540 635 675 750 762 900 1,125 1,143 1,270 1,350 1,500 1,524 1,905 2,250 2,286 2,540 2,700 3,175 3,375 3,429 3,810 4,500 4,572 5,715 6,350 6,750 6,858 7,620 9,525 11,430 12,700 13,500 13,716 15,875 17,145 19,050 22,860 28,575 31,750 34,290 38,100 47,625 57,150 63,500 68,580 85,725 95,250 114,300 142,875 171,450 190,500 285,750 342,900 428,625 571,500 857,250 and 1,714,500, with no remainder.
Since 1,714,500 cannot be divided by just 1 and 1,714,500, it is not a prime number.