A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3012264 can be evenly divided by 1 2 3 4 6 8 9 12 17 18 23 24 34 36 46 51 68 69 72 92 102 107 136 138 153 184 204 207 214 276 306 321 391 408 414 428 552 612 642 782 828 856 963 1,173 1,224 1,284 1,564 1,656 1,819 1,926 2,346 2,461 2,568 3,128 3,519 3,638 3,852 4,692 4,922 5,457 7,038 7,276 7,383 7,704 9,384 9,844 10,914 14,076 14,552 14,766 16,371 19,688 21,828 22,149 28,152 29,532 32,742 41,837 43,656 44,298 59,064 65,484 83,674 88,596 125,511 130,968 167,348 177,192 251,022 334,696 376,533 502,044 753,066 1,004,088 1,506,132 and 3,012,264, with no remainder.
Since 3,012,264 cannot be divided by just 1 and 3,012,264, it is not a prime number.