342

342 = 2 x 3² x 19.

342 is 666 in base 7. It is the smallest number that can be represented by 666 in any base. 342 is also 2332 in base 5.

342 is a heptagonal number.

342 is the number of inequivalent binary linear codes of length 8.

IC 342 (also known as Caldwell 5) is a spiral galaxy in the constellation Camelopardalis.

Source: Number Gossip