25985765 has 8 divisors (see below), whose sum is σ = 33581688. Its totient is φ = 19189440.

The previous prime is 25985761. The next prime is 25985797. The reversal of 25985765 is 56758952.

It can be written as a sum of positive squares in 4 ways, for example, as 1552516 + 24433249 = 1246^2 + 4943^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25985765 - 2² = 25985761 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25985761) 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 7 ways as a sum of consecutive naturals, for example, 199826 + ... + 199955.

It is an arithmetic number, because the mean of its divisors is an integer number (4197711).

Almost surely, 2^25985765 is an apocalyptic number.

It is an amenable number.

25985765 is a deficient number, since it is larger than the sum of its proper divisors (7595923).

25985765 is a wasteful number, since it uses less digits than its factorization.

25985765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399799.

The product of its digits is 756000, while the sum is 47.

The square root of 25985765 is about 5097.6234658907. The cubic root of 25985765 is about 296.1955314175.

The spelling of 25985765 in words is "twenty-five million, nine hundred eighty-five thousand, seven hundred sixty-five".