556081 has 4 divisors (see below), whose sum is σ = 563200. Its totient is φ = 548964.

The previous prime is 556069. The next prime is 556093. The reversal of 556081 is 180655.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 180655 = 5 ⋅36131.

It is an interprime number because it is at equal distance from previous prime (556069) and next prime (556093).

It is a cyclic number.

It is not a de Polignac number, because 556081 - 2⁷ = 555953 is a prime.

It is a super-2 number, since 2×556081² = 618452157122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556021) 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, 3441 + ... + 3598.

It is an arithmetic number, because the mean of its divisors is an integer number (140800).

2⁵⁵⁶⁰⁸¹ is an apocalyptic number.

It is an amenable number.

556081 is a deficient number, since it is larger than the sum of its proper divisors (7119).

556081 is an equidigital number, since it uses as much as digits as its factorization.

556081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7118.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 556081 is about 745.7083880445. The cubic root of 556081 is about 82.2329781265.

The spelling of 556081 in words is "five hundred fifty-six thousand, eighty-one".