260657261 has 4 divisors (see below), whose sum is σ = 263956800. Its totient is φ = 257357724.

The previous prime is 260657239. The next prime is 260657263. The reversal of 260657261 is 162756062.

260657261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 260657261 - 2¹⁰ = 260656237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260657263) 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, 1649651 + ... + 1649808.

It is an arithmetic number, because the mean of its divisors is an integer number (65989200).

Almost surely, 2^260657261 is an apocalyptic number.

It is an amenable number.

260657261 is a deficient number, since it is larger than the sum of its proper divisors (3299539).

260657261 is an equidigital number, since it uses as much as digits as its factorization.

260657261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3299538.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 260657261 is about 16144.8834309821. The cubic root of 260657261 is about 638.7877941493.

The spelling of 260657261 in words is "two hundred sixty million, six hundred fifty-seven thousand, two hundred sixty-one".