261056041 has 4 divisors (see below), whose sum is σ = 261174672. Its totient is φ = 260937412.

The previous prime is 261056021. The next prime is 261056051. The reversal of 261056041 is 140650162.

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.

It is a cyclic number.

It is not a de Polignac number, because 261056041 - 2⁵ = 261056009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261055997 and 261056015.

It is not an unprimeable number, because it can be changed into a prime (261056011) 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, 55951 + ... + 60436.

It is an arithmetic number, because the mean of its divisors is an integer number (65293668).

Almost surely, 2^261056041 is an apocalyptic number.

It is an amenable number.

261056041 is a deficient number, since it is larger than the sum of its proper divisors (118631).

261056041 is a wasteful number, since it uses less digits than its factorization.

261056041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118630.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 261056041 is about 16157.2287537189. The cubic root of 261056041 is about 639.1133890179.

The spelling of 261056041 in words is "two hundred sixty-one million, fifty-six thousand, forty-one".