9141

9141 = 3 x 11 x 277.

9141 yields a prime whenever a 1 is inserted anywhere, including the beginning or end (A068679 and A216165).

9141 is the number of ways to partition 2³⁰ into distinct positive integers not greater than 30 (A079122).

9141 is a tetrahedral number written backwards (A004161).

9141 is a member of the sequence generated by starting with 1 and repeatedly reversing the digits and adding 65 to get the next term (A118163).

Source: On-Line Encyclopedia of Integer Sequences