542656 has 28 divisors (see below), whose sum is σ = 1102360. Its totient is φ = 264960.

The previous prime is 542603. The next prime is 542683. The reversal of 542656 is 656245.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3835 + ... + 3973.

It is an arithmetic number, because the mean of its divisors is an integer number (39370).

2⁵⁴²⁶⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 542656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (551180).

542656 is an abundant number, since it is smaller than the sum of its proper divisors (559704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

542656 is a wasteful number, since it uses less digits than its factorization.

542656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 202 counting only the distinct ones).

The product of its digits is 7200, while the sum is 28.

The square root of 542656 is about 736.6518852212. The cubic root of 542656 is about 81.5658193381.

The spelling of 542656 in words is "five hundred forty-two thousand, six hundred fifty-six".