A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2741472 can be evenly divided by 1 2 3 4 6 8 9 12 16 18 19 24 27 32 36 38 48 54 57 72 76 96 108 114 144 152 167 171 216 228 288 304 334 342 432 456 501 513 608 668 684 864 912 1,002 1,026 1,336 1,368 1,503 1,824 2,004 2,052 2,672 2,736 3,006 3,173 4,008 4,104 4,509 5,344 5,472 6,012 6,346 8,016 8,208 9,018 9,519 12,024 12,692 16,032 16,416 18,036 19,038 24,048 25,384 28,557 36,072 38,076 48,096 50,768 57,114 72,144 76,152 85,671 101,536 114,228 144,288 152,304 171,342 228,456 304,608 342,684 456,912 685,368 913,824 1,370,736 and 2,741,472, with no remainder.
Since 2,741,472 cannot be divided by just 1 and 2,741,472, it is not a prime number.