556345 has 4 divisors (see below), whose sum is σ = 667620. Its totient is φ = 445072.

The previous prime is 556343. The next prime is 556351. The reversal of 556345 is 543655.

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

It can be written as a sum of positive squares in 2 ways, for example, as 163216 + 393129 = 404^2 + 627^2 .

It is a cyclic number.

It is not a de Polignac number, because 556345 - 2¹ = 556343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (556343) 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 3 ways as a sum of consecutive naturals, for example, 55630 + ... + 55639.

It is an arithmetic number, because the mean of its divisors is an integer number (166905).

2⁵⁵⁶³⁴⁵ is an apocalyptic number.

It is an amenable number.

556345 is a deficient number, since it is larger than the sum of its proper divisors (111275).

556345 is a wasteful number, since it uses less digits than its factorization.

556345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111274.

The product of its digits is 9000, while the sum is 28.

The square root of 556345 is about 745.8853799345. The cubic root of 556345 is about 82.2459894633.

It can be divided in two parts, 55 and 6345, that added together give a square (6400 = 80²).

The spelling of 556345 in words is "five hundred fifty-six thousand, three hundred forty-five".