556726 has 4 divisors (see below), whose sum is σ = 835092. Its totient is φ = 278362.

The previous prime is 556723. The next prime is 556727. The reversal of 556726 is 627655.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139180 + ... + 139183.

It is an arithmetic number, because the mean of its divisors is an integer number (208773).

2⁵⁵⁶⁷²⁶ is an apocalyptic number.

556726 is a deficient number, since it is larger than the sum of its proper divisors (278366).

556726 is a wasteful number, since it uses less digits than its factorization.

556726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278365.

The product of its digits is 12600, while the sum is 31.

The square root of 556726 is about 746.1407373948. The cubic root of 556726 is about 82.2647599334.

The spelling of 556726 in words is "five hundred fifty-six thousand, seven hundred twenty-six".