556447 has 4 divisors (see below), whose sum is σ = 567000. Its totient is φ = 545896.

The previous prime is 556441. The next prime is 556459. The reversal of 556447 is 744655.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 744655 = 5 ⋅148931.

It is a cyclic number.

It is not a de Polignac number, because 556447 - 2¹⁹ = 32159 is a prime.

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 Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5197 + ... + 5302.

It is an arithmetic number, because the mean of its divisors is an integer number (141750).

2⁵⁵⁶⁴⁴⁷ is an apocalyptic number.

556447 is a deficient number, since it is larger than the sum of its proper divisors (10553).

556447 is a wasteful number, since it uses less digits than its factorization.

556447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10552.

The product of its digits is 16800, while the sum is 31.

The square root of 556447 is about 745.9537519176. The cubic root of 556447 is about 82.2510154683.

The spelling of 556447 in words is "five hundred fifty-six thousand, four hundred forty-seven".