A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 1196208 can be evenly divided by 1 2 3 4 6 8 9 12 13 16 18 24 26 27 36 39 48 52 54 71 72 78 81 104 108 117 142 144 156 162 208 213 216 234 284 312 324 351 426 432 468 568 624 639 648 702 852 923 936 1,053 1,136 1,278 1,296 1,404 1,704 1,846 1,872 1,917 2,106 2,556 2,769 2,808 3,408 3,692 3,834 4,212 5,112 5,538 5,616 5,751 7,384 7,668 8,307 8,424 10,224 11,076 11,502 14,768 15,336 16,614 16,848 22,152 23,004 24,921 30,672 33,228 44,304 46,008 49,842 66,456 74,763 92,016 99,684 132,912 149,526 199,368 299,052 398,736 598,104 and 1,196,208, with no remainder.
Since 1,196,208 cannot be divided by just 1 and 1,196,208, it is not a prime number.