A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4956435 can be evenly divided by 1 3 5 9 11 15 17 19 31 33 45 51 55 57 85 93 95 99 153 155 165 171 187 209 255 279 285 323 341 465 495 527 561 589 627 765 855 935 969 1,023 1,045 1,395 1,581 1,615 1,683 1,705 1,767 1,881 2,635 2,805 2,907 2,945 3,069 3,135 3,553 4,743 4,845 5,115 5,301 5,797 6,479 7,905 8,415 8,835 9,405 10,013 10,659 14,535 15,345 17,391 17,765 19,437 23,715 26,505 28,985 30,039 31,977 32,395 50,065 52,173 53,295 58,311 86,955 90,117 97,185 110,143 150,195 159,885 260,865 291,555 330,429 450,585 550,715 991,287 1,652,145 and 4,956,435, with no remainder.
Since 4,956,435 cannot be divided by just 1 and 4,956,435, it is not a prime number.