A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3563070 can be evenly divided by 1 2 3 5 6 7 10 14 15 19 21 30 35 38 42 47 57 70 94 95 105 114 133 141 190 210 235 266 282 285 329 361 399 470 570 658 665 705 722 798 893 987 1,083 1,330 1,410 1,645 1,786 1,805 1,974 1,995 2,166 2,527 2,679 3,290 3,610 3,990 4,465 4,935 5,054 5,358 5,415 6,251 7,581 8,930 9,870 10,830 12,502 12,635 13,395 15,162 16,967 18,753 25,270 26,790 31,255 33,934 37,506 37,905 50,901 62,510 75,810 84,835 93,765 101,802 118,769 169,670 187,530 237,538 254,505 356,307 509,010 593,845 712,614 1,187,690 1,781,535 and 3,563,070, with no remainder.
Since 3,563,070 cannot be divided by just 1 and 3,563,070, it is not a prime number.