542

542 = 2 x 271.

542 is a member of the Fibonacci-type sequence starting with 3 and 8.

542 is 20132 in base 4 and 4132 in base 5. It is 392 in base 12 and 329 in base 13.

542 is the number of primes less than 10⁴ having at least one digit 9 (A091710).

542 is the sum of no fewer than 17 fourth powers (A099591).

Source: What's Special About This Number?