261256 has 24 divisors (see below), whose sum is σ = 524970. Its totient is φ = 121856.

The previous prime is 261251. The next prime is 261271. The reversal of 261256 is 652162.

It can be written as a sum of positive squares in 3 ways, for example, as 217156 + 44100 = 466^2 + 210^2 .

It is a nialpdrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2256 + ... + 2368.

2²⁶¹²⁵⁶ is an apocalyptic number.

It is an amenable number.

261256 is an abundant number, since it is smaller than the sum of its proper divisors (263714).

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

261256 is a wasteful number, since it uses less digits than its factorization.

261256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 132 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 261256 is about 511.1320768647. The cubic root of 261256 is about 63.9276526223.

The spelling of 261256 in words is "two hundred sixty-one thousand, two hundred fifty-six".