A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5946048 can be evenly divided by 1 2 3 4 6 8 9 12 16 18 24 27 31 32 36 37 48 54 62 64 72 74 81 93 96 108 111 124 144 148 162 186 192 216 222 248 279 288 296 324 333 372 432 444 496 558 576 592 648 666 744 837 864 888 992 999 1,116 1,147 1,184 1,296 1,332 1,488 1,674 1,728 1,776 1,984 1,998 2,232 2,294 2,368 2,511 2,592 2,664 2,976 2,997 3,348 3,441 3,552 3,996 4,464 4,588 5,022 5,184 5,328 5,952 5,994 6,696 6,882 7,104 7,992 8,928 9,176 10,044 10,323 10,656 11,988 13,392 13,764 15,984 17,856 18,352 20,088 20,646 21,312 23,976 26,784 27,528 30,969 31,968 36,704 40,176 41,292 47,952 53,568 55,056 61,938 63,936 73,408 80,352 82,584 92,907 95,904 110,112 123,876 160,704 165,168 185,814 191,808 220,224 247,752 330,336 371,628 495,504 660,672 743,256 991,008 1,486,512 1,982,016 2,973,024 and 5,946,048, with no remainder.
Since 5,946,048 cannot be divided by just 1 and 5,946,048, it is not a prime number.