Q: Is 1,218,888 a Prime Number?
A: No, 1,218,888 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 1218888 can be evenly divided by 1 2 3 4 6 8 9 11 12 18 19 22 24 27 33 36 38 44 54 57 66 72 76 81 88 99 108 114 132 152 162 171 198 209 216 228 243 264 297 324 342 396 418 456 486 513 594 627 648 684 729 792 836 891 972 1,026 1,188 1,254 1,368 1,458 1,539 1,672 1,782 1,881 1,944 2,052 2,376 2,508 2,673 2,916 3,078 3,564 3,762 4,104 4,617 5,016 5,346 5,643 5,832 6,156 7,128 7,524 8,019 9,234 10,692 11,286 12,312 13,851 15,048 16,038 16,929 18,468 21,384 22,572 27,702 32,076 33,858 36,936 45,144 50,787 55,404 64,152 67,716 101,574 110,808 135,432 152,361 203,148 304,722 406,296 609,444 and 1,218,888, with no remainder.
Since 1,218,888 cannot be divided by just 1 and 1,218,888, it is not a prime number.