A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 1474980 can be evenly divided by 1 2 3 4 5 6 10 12 13 15 20 26 30 31 39 52 60 61 62 65 78 93 122 124 130 155 156 183 186 195 244 260 305 310 366 372 390 403 465 610 620 732 780 793 806 915 930 1,209 1,220 1,586 1,612 1,830 1,860 1,891 2,015 2,379 2,418 3,172 3,660 3,782 3,965 4,030 4,758 4,836 5,673 6,045 7,564 7,930 8,060 9,455 9,516 11,346 11,895 12,090 15,860 18,910 22,692 23,790 24,180 24,583 28,365 37,820 47,580 49,166 56,730 73,749 98,332 113,460 122,915 147,498 245,830 294,996 368,745 491,660 737,490 and 1,474,980, with no remainder.
Since 1,474,980 cannot be divided by just 1 and 1,474,980, it is not a prime number.