25461565 has 16 divisors (see below), whose sum is σ = 31978800. Its totient is φ = 19436032.

The previous prime is 25461551. The next prime is 25461589. The reversal of 25461565 is 56516452.

It can be written as a sum of positive squares in 8 ways, for example, as 3437316 + 22024249 = 1854^2 + 4693^2 .

It is not a de Polignac number, because 25461565 - 2¹¹ = 25459517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25461565.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 11919 + ... + 13891.

It is an arithmetic number, because the mean of its divisors is an integer number (1998675).

Almost surely, 2^25461565 is an apocalyptic number.

It is an amenable number.

25461565 is a deficient number, since it is larger than the sum of its proper divisors (6517235).

25461565 is a wasteful number, since it uses less digits than its factorization.

25461565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2096.

The product of its digits is 36000, while the sum is 34.

The square root of 25461565 is about 5045.9454020035. The cubic root of 25461565 is about 294.1903105525.

The spelling of 25461565 in words is "twenty-five million, four hundred sixty-one thousand, five hundred sixty-five".