556257 has 16 divisors (see below), whose sum is σ = 846720. Its totient is φ = 321792.

The previous prime is 556253. The next prime is 556261. The reversal of 556257 is 752655.

556257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (556253) and next prime (556261).

It is not a de Polignac number, because 556257 - 2² = 556253 is a prime.

556257 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (556253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244 + ... + 1082.

It is an arithmetic number, because the mean of its divisors is an integer number (52920).

2⁵⁵⁶²⁵⁷ is an apocalyptic number.

It is an amenable number.

556257 is a deficient number, since it is larger than the sum of its proper divisors (290463).

556257 is a wasteful number, since it uses less digits than its factorization.

556257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872.

The product of its digits is 10500, while the sum is 30.

The square root of 556257 is about 745.8263873047. The cubic root of 556257 is about 82.2416528085.

The spelling of 556257 in words is "five hundred fifty-six thousand, two hundred fifty-seven".