261256254 has 16 divisors (see below), whose sum is σ = 597157248. Its totient is φ = 74644632.

The previous prime is 261256243. The next prime is 261256267. The reversal of 261256254 is 452652162.

261256254 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×261256254² = 136509660508225032, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3110152 + ... + 3110235.

It is an arithmetic number, because the mean of its divisors is an integer number (37322328).

Almost surely, 2^261256254 is an apocalyptic number.

261256254 is an abundant number, since it is smaller than the sum of its proper divisors (335900994).

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

261256254 is a wasteful number, since it uses less digits than its factorization.

261256254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6220399.

The product of its digits is 28800, while the sum is 33.

The square root of 261256254 is about 16163.4233378947. The cubic root of 261256254 is about 639.2767333971.

The spelling of 261256254 in words is "two hundred sixty-one million, two hundred fifty-six thousand, two hundred fifty-four".