A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4106214 can be evenly divided by 1 2 3 6 7 9 14 17 18 21 27 34 42 51 54 63 71 81 102 119 126 142 153 162 189 213 238 243 306 357 378 426 459 486 497 567 639 714 918 994 1,071 1,134 1,207 1,278 1,377 1,491 1,701 1,917 2,142 2,414 2,754 2,982 3,213 3,402 3,621 3,834 4,131 4,473 5,751 6,426 7,242 8,262 8,449 8,946 9,639 10,863 11,502 13,419 16,898 17,253 19,278 21,726 25,347 26,838 28,917 32,589 34,506 40,257 50,694 57,834 65,178 76,041 80,514 97,767 120,771 152,082 195,534 228,123 241,542 293,301 456,246 586,602 684,369 1,368,738 2,053,107 and 4,106,214, with no remainder.
Since 4,106,214 cannot be divided by just 1 and 4,106,214, it is not a prime number.