556423 has 8 divisors (see below), whose sum is σ = 658080. Its totient is φ = 460320.

The previous prime is 556403. The next prime is 556441. The reversal of 556423 is 324655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-556423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1168 + ... + 1573.

It is an arithmetic number, because the mean of its divisors is an integer number (82260).

2⁵⁵⁶⁴²³ is an apocalyptic number.

556423 is a deficient number, since it is larger than the sum of its proper divisors (101657).

556423 is a wasteful number, since it uses less digits than its factorization.

556423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2777.

The product of its digits is 3600, while the sum is 25.

The square root of 556423 is about 745.9376649560. The cubic root of 556423 is about 82.2498329342.

It can be divided in two parts, 556 and 423, that added together give a palindrome (979).

The spelling of 556423 in words is "five hundred fifty-six thousand, four hundred twenty-three".