A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 1065064 can be evenly divided by 1 2 4 7 8 11 13 14 19 22 26 28 38 44 49 52 56 76 77 88 91 98 104 133 143 152 154 182 196 209 247 266 286 308 364 392 418 494 532 539 572 616 637 728 836 931 988 1,001 1,064 1,078 1,144 1,274 1,463 1,672 1,729 1,862 1,976 2,002 2,156 2,548 2,717 2,926 3,458 3,724 4,004 4,312 5,096 5,434 5,852 6,916 7,007 7,448 8,008 10,241 10,868 11,704 12,103 13,832 14,014 19,019 20,482 21,736 24,206 28,028 38,038 40,964 48,412 56,056 76,076 81,928 96,824 133,133 152,152 266,266 532,532 and 1,065,064, with no remainder.
Since 1,065,064 cannot be divided by just 1 and 1,065,064, it is not a prime number.