25927561 has 8 divisors (see below), whose sum is σ = 28374048. Its totient is φ = 23496000.

The previous prime is 25927553. The next prime is 25927579. The reversal of 25927561 is 16572952.

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

It is not a de Polignac number, because 25927561 - 2³ = 25927553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25927561.

It is not an unprimeable number, because it can be changed into a prime (25927591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81 + ... + 7201.

It is an arithmetic number, because the mean of its divisors is an integer number (3546756).

Almost surely, 2^25927561 is an apocalyptic number.

It is an amenable number.

25927561 is a deficient number, since it is larger than the sum of its proper divisors (2446487).

25927561 is a wasteful number, since it uses less digits than its factorization.

25927561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7463.

The product of its digits is 37800, while the sum is 37.

The square root of 25927561 is about 5091.9113307284. The cubic root of 25927561 is about 295.9742224021.

It can be divided in two parts, 2592 and 7561, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 25927561 in words is "twenty-five million, nine hundred twenty-seven thousand, five hundred sixty-one".