A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4317180 can be evenly divided by 1 2 3 4 5 6 7 10 12 14 15 19 20 21 28 30 35 38 42 57 60 70 76 84 95 105 114 133 140 190 210 228 266 285 380 399 420 532 541 570 665 798 1,082 1,140 1,330 1,596 1,623 1,995 2,164 2,660 2,705 3,246 3,787 3,990 5,410 6,492 7,574 7,980 8,115 10,279 10,820 11,361 15,148 16,230 18,935 20,558 22,722 30,837 32,460 37,870 41,116 45,444 51,395 56,805 61,674 71,953 75,740 102,790 113,610 123,348 143,906 154,185 205,580 215,859 227,220 287,812 308,370 359,765 431,718 616,740 719,530 863,436 1,079,295 1,439,060 2,158,590 and 4,317,180, with no remainder.
Since 4,317,180 cannot be divided by just 1 and 4,317,180, it is not a prime number.