A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4042710 can be evenly divided by 1 2 3 5 6 7 9 10 14 15 18 21 23 27 30 31 35 42 45 46 54 62 63 69 70 81 90 93 105 115 126 135 138 155 161 162 186 189 207 210 217 230 270 279 310 315 322 345 378 405 414 434 465 483 558 567 621 630 651 690 713 805 810 837 930 945 966 1,035 1,085 1,134 1,242 1,302 1,395 1,426 1,449 1,610 1,674 1,863 1,890 1,953 2,070 2,139 2,170 2,415 2,511 2,790 2,835 2,898 3,105 3,255 3,565 3,726 3,906 4,185 4,278 4,347 4,830 4,991 5,022 5,670 5,859 6,210 6,417 6,510 7,130 7,245 8,370 8,694 9,315 9,765 9,982 10,695 11,718 12,555 12,834 13,041 14,490 14,973 17,577 18,630 19,251 19,530 21,390 21,735 24,955 25,110 26,082 29,295 29,946 32,085 35,154 38,502 43,470 44,919 49,910 57,753 58,590 64,170 65,205 74,865 87,885 89,838 96,255 115,506 130,410 134,757 149,730 175,770 192,510 224,595 269,514 288,765 404,271 449,190 577,530 673,785 808,542 1,347,570 2,021,355 and 4,042,710, with no remainder.
Since 4,042,710 cannot be divided by just 1 and 4,042,710, it is not a prime number.