542556 has 36 divisors (see below), whose sum is σ = 1568112. Its totient is φ = 154944.

The previous prime is 542551. The next prime is 542557. The reversal of 542556 is 655245.

542556 is nontrivially palindromic in base 13.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542551) by changing a digit.

542556 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 825 + ... + 1328.

2⁵⁴²⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

542556 is an abundant number, since it is smaller than the sum of its proper divisors (1025556).

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

542556 is a wasteful number, since it uses less digits than its factorization.

542556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2170 (or 2165 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 542556 is about 736.5840074289. The cubic root of 542556 is about 81.5608087464.

The spelling of 542556 in words is "five hundred forty-two thousand, five hundred fifty-six".