5446

5446 = 2 x 7  x 389.

5446 is the number of ways to arrange the numbers 1 to 10 around a circle so that the sums of adjacent numbers are distinct.

5446 is 41114 in base 6 (A043013).

The 5446th prime (53,407) minus 5446 is a square (A064370): 53407 - 5446 = 47961 = 219².

Source: What's Special About This Number?