A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 1694160 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 13 15 16 18 20 24 26 30 36 39 40 45 48 52 60 65 72 78 80 90 104 117 120 130 144 156 180 181 195 208 234 240 260 312 360 362 390 468 520 543 585 624 720 724 780 905 936 1,040 1,086 1,170 1,448 1,560 1,629 1,810 1,872 2,172 2,340 2,353 2,715 2,896 3,120 3,258 3,620 4,344 4,680 4,706 5,430 6,516 7,059 7,240 8,145 8,688 9,360 9,412 10,860 11,765 13,032 14,118 14,480 16,290 18,824 21,177 21,720 23,530 26,064 28,236 32,580 35,295 37,648 42,354 43,440 47,060 56,472 65,160 70,590 84,708 94,120 105,885 112,944 130,320 141,180 169,416 188,240 211,770 282,360 338,832 423,540 564,720 847,080 and 1,694,160, with no remainder.
Since 1,694,160 cannot be divided by just 1 and 1,694,160, it is not a prime number.