25806765 has 16 divisors (see below), whose sum is σ = 43720128. Its totient is φ = 12953856.

The previous prime is 25806763. The next prime is 25806773. The reversal of 25806765 is 56760852.

It is a happy number.

It is not a de Polignac number, because 25806765 - 2¹ = 25806763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25806761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50347 + ... + 50856.

It is an arithmetic number, because the mean of its divisors is an integer number (2732508).

Almost surely, 2^25806765 is an apocalyptic number.

It is an amenable number.

25806765 is a deficient number, since it is larger than the sum of its proper divisors (17913363).

25806765 is a wasteful number, since it uses less digits than its factorization.

25806765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101228.

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 25806765 is about 5080.0359250698. The cubic root of 25806765 is about 295.5138606821.

The spelling of 25806765 in words is "twenty-five million, eight hundred six thousand, seven hundred sixty-five".