A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 194040 can be evenly divided by 1 2 3 4 5 6 7 8 9 10 11 12 14 15 18 20 21 22 24 28 30 33 35 36 40 42 44 45 49 55 56 60 63 66 70 72 77 84 88 90 98 99 105 110 120 126 132 140 147 154 165 168 180 196 198 210 220 231 245 252 264 280 294 308 315 330 360 385 392 396 420 440 441 462 490 495 504 539 588 616 630 660 693 735 770 792 840 882 924 980 990 1,078 1,155 1,176 1,260 1,320 1,386 1,470 1,540 1,617 1,764 1,848 1,960 1,980 2,156 2,205 2,310 2,520 2,695 2,772 2,940 3,080 3,234 3,465 3,528 3,960 4,312 4,410 4,620 4,851 5,390 5,544 5,880 6,468 6,930 8,085 8,820 9,240 9,702 10,780 12,936 13,860 16,170 17,640 19,404 21,560 24,255 27,720 32,340 38,808 48,510 64,680 97,020 and 194,040, with no remainder.
Since 194,040 cannot be divided by just 1 and 194,040, it is not a prime number.