5781256 has 16 divisors (see below), whose sum is σ = 11673900. Its totient is φ = 2668224.

The previous prime is 5781253. The next prime is 5781271. The reversal of 5781256 is 6521875.

5781256 = T₁₂₄ + T₁₂₅ + ... + T₃₃₁.

It can be written as a sum of positive squares in 2 ways, for example, as 4268356 + 1512900 = 2066^2 + 1230^2 .

It is an Ulam number.

It is a d-powerful number, because it can be written as 5² + 7⁸ + 8³ + 1 + 2⁸ + 5⁶ + 6² .

It is not an unprimeable number, because it can be changed into a prime (5781253) 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, 27691 + ... + 27898.

Almost surely, 2^5781256 is an apocalyptic number.

It is an amenable number.

5781256 is an abundant number, since it is smaller than the sum of its proper divisors (5892644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5781256 is a wasteful number, since it uses less digits than its factorization.

5781256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55608 (or 55604 counting only the distinct ones).

The product of its digits is 16800, while the sum is 34.

The square root of 5781256 is about 2404.4242554092. The cubic root of 5781256 is about 179.4764208908.

The spelling of 5781256 in words is "five million, seven hundred eighty-one thousand, two hundred fifty-six".