556945 has 16 divisors (see below), whose sum is σ = 725760. Its totient is φ = 409024.

The previous prime is 556943. The next prime is 556957. The reversal of 556945 is 549655.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 556945 - 2¹ = 556943 is a prime.

556945 is a lucky number.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 556945.

It is not an unprimeable number, because it can be changed into a prime (556943) 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 15 ways as a sum of consecutive naturals, for example, 3252 + ... + 3418.

It is an arithmetic number, because the mean of its divisors is an integer number (45360).

2⁵⁵⁶⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

556945 is a deficient number, since it is larger than the sum of its proper divisors (168815).

556945 is a wasteful number, since it uses less digits than its factorization.

556945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224.

The product of its digits is 27000, while the sum is 34.

The square root of 556945 is about 746.2874781209. The cubic root of 556945 is about 82.2755453830.

The spelling of 556945 in words is "five hundred fifty-six thousand, nine hundred forty-five".