25520765 has 16 divisors (see below), whose sum is σ = 31553280. Its totient is φ = 19805760.

The previous prime is 25520749. The next prime is 25520779. The reversal of 25520765 is 56702552.

It is not a de Polignac number, because 25520765 - 2⁴ = 25520749 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30371 + ... + 31199.

It is an arithmetic number, because the mean of its divisors is an integer number (1972080).

Almost surely, 2^25520765 is an apocalyptic number.

It is an amenable number.

25520765 is a deficient number, since it is larger than the sum of its proper divisors (6032515).

25520765 is a wasteful number, since it uses less digits than its factorization.

25520765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012.

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 25520765 is about 5051.8080921587. The cubic root of 25520765 is about 294.4181387308.

The spelling of 25520765 in words is "twenty-five million, five hundred twenty thousand, seven hundred sixty-five".