556542 has 36 divisors (see below), whose sum is σ = 1404936. Its totient is φ = 158760.

The previous prime is 556537. The next prime is 556559. The reversal of 556542 is 245655.

556542 is a `hidden beast` number, since 5 + 5 + 654 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

556542 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 17 ways as a sum of consecutive naturals, for example, 567 + ... + 1197.

It is an arithmetic number, because the mean of its divisors is an integer number (39026).

2⁵⁵⁶⁵⁴² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 556542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (702468).

556542 is an abundant number, since it is smaller than the sum of its proper divisors (848394).

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

556542 is a wasteful number, since it uses less digits than its factorization.

556542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653 (or 643 counting only the distinct ones).

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

The square root of 556542 is about 746.0174260699. The cubic root of 556542 is about 82.2556959991.

The spelling of 556542 in words is "five hundred fifty-six thousand, five hundred forty-two".