25881559 has 16 divisors (see below), whose sum is σ = 29583360. Its totient is φ = 22428000.

The previous prime is 25881547. The next prime is 25881577. The reversal of 25881559 is 95518852.

It is a cyclic number.

It is not a de Polignac number, because 25881559 - 2⁹ = 25881047 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 (25887559) 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, 23677 + ... + 24745.

It is an arithmetic number, because the mean of its divisors is an integer number (1848960).

Almost surely, 2^25881559 is an apocalyptic number.

25881559 is a deficient number, since it is larger than the sum of its proper divisors (3701801).

25881559 is a wasteful number, since it uses less digits than its factorization.

25881559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182.

The product of its digits is 144000, while the sum is 43.

The square root of 25881559 is about 5087.3921610192. The cubic root of 25881559 is about 295.7990745931.

The spelling of 25881559 in words is "twenty-five million, eight hundred eighty-one thousand, five hundred fifty-nine".