25805713 has 4 divisors (see below), whose sum is σ = 25948468. Its totient is φ = 25662960.

The previous prime is 25805707. The next prime is 25805729. The reversal of 25805713 is 31750852.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2985984 + 22819729 = 1728^2 + 4777^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25805713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25805413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71106 + ... + 71467.

It is an arithmetic number, because the mean of its divisors is an integer number (6487117).

Almost surely, 2^25805713 is an apocalyptic number.

It is an amenable number.

25805713 is a deficient number, since it is larger than the sum of its proper divisors (142755).

25805713 is a wasteful number, since it uses less digits than its factorization.

25805713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142754.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 25805713 is about 5079.9323814397. The cubic root of 25805713 is about 295.5098451355.

The spelling of 25805713 in words is "twenty-five million, eight hundred five thousand, seven hundred thirteen".