25986865 has 8 divisors (see below), whose sum is σ = 31212288. Its totient is φ = 20770800.

The previous prime is 25986847. The next prime is 25986869. The reversal of 25986865 is 56868952.

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

It is not a de Polignac number, because 25986865 - 2²¹ = 23889713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25986869) 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, 7690 + ... + 10540.

It is an arithmetic number, because the mean of its divisors is an integer number (3901536).

Almost surely, 2^25986865 is an apocalyptic number.

It is an amenable number.

25986865 is a deficient number, since it is larger than the sum of its proper divisors (5225423).

25986865 is a wasteful number, since it uses less digits than its factorization.

25986865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4679.

The product of its digits is 1036800, while the sum is 49.

The square root of 25986865 is about 5097.7313581632. The cubic root of 25986865 is about 296.1997107632.

The spelling of 25986865 in words is "twenty-five million, nine hundred eighty-six thousand, eight hundred sixty-five".