A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3474702 can be evenly divided by 1 2 3 6 7 9 11 14 18 21 22 23 33 42 46 63 66 69 77 99 109 126 138 154 161 198 207 218 231 253 322 327 414 462 483 506 654 693 759 763 966 981 1,199 1,386 1,449 1,518 1,526 1,771 1,962 2,277 2,289 2,398 2,507 2,898 3,542 3,597 4,554 4,578 5,014 5,313 6,867 7,194 7,521 8,393 10,626 10,791 13,734 15,042 15,939 16,786 17,549 21,582 22,563 25,179 27,577 31,878 35,098 45,126 50,358 52,647 55,154 75,537 82,731 105,294 151,074 157,941 165,462 193,039 248,193 315,882 386,078 496,386 579,117 1,158,234 1,737,351 and 3,474,702, with no remainder.
Since 3,474,702 cannot be divided by just 1 and 3,474,702, it is not a prime number.