556541 has 4 divisors (see below), whose sum is σ = 559932. Its totient is φ = 553152.

The previous prime is 556537. The next prime is 556559. The reversal of 556541 is 145655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 145655 = 5 ⋅29131.

It can be written as a sum of positive squares in 2 ways, for example, as 504100 + 52441 = 710^2 + 229^2 .

It is a cyclic number.

It is not a de Polignac number, because 556541 - 2² = 556537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 556541.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1436 + ... + 1781.

It is an arithmetic number, because the mean of its divisors is an integer number (139983).

2⁵⁵⁶⁵⁴¹ is an apocalyptic number.

It is an amenable number.

556541 is a deficient number, since it is larger than the sum of its proper divisors (3391).

556541 is a wasteful number, since it uses less digits than its factorization.

556541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3390.

The product of its digits is 3000, while the sum is 26.

The square root of 556541 is about 746.0167558440. The cubic root of 556541 is about 82.2556467331.

It can be divided in two parts, 55654 and 1, that added together give a palindrome (55655).

The spelling of 556541 in words is "five hundred fifty-six thousand, five hundred forty-one".