6560391 has 4 divisors (see below), whose sum is σ = 8747192. Its totient is φ = 4373592.

The previous prime is 6560371. The next prime is 6560413. The reversal of 6560391 is 1930656.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6560391 - 2⁶ = 6560327 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6560341) 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, 1093396 + ... + 1093401.

It is an arithmetic number, because the mean of its divisors is an integer number (2186798).

Almost surely, 2^6560391 is an apocalyptic number.

6560391 is a deficient number, since it is larger than the sum of its proper divisors (2186801).

6560391 is a wasteful number, since it uses less digits than its factorization.

6560391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2186800.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 6560391 is about 2561.3260237619. The cubic root of 6560391 is about 187.2017516181.

The spelling of 6560391 in words is "six million, five hundred sixty thousand, three hundred ninety-one".