246 (number)

246 is the natural number following 245 and preceding 247.
Additionally, 246 is:

an untouchable number.
palindromic in bases 5, 9, 40, 81, 122 and 245.
a Harshad number in bases 2, 3, 6, 7, 9, 11.
the smallest number N for which it is known that there is an infinite number of prime gaps no larger than N.

Also:

The aliquot sequence starting at 246 is: 246, 258, 270, 450, 759, 393, 135, 105, 87, 33, 15, 9, 4, 3, 1, 0.
There are exactly 246 different rooted plane trees with eight nodes, and 246 different necklaces with seven black and seven white beads.