25686081 has 12 divisors (see below), whose sum is σ = 39055120. Its totient is φ = 16222680.

The previous prime is 25686077. The next prime is 25686097. The reversal of 25686081 is 18068652.

It is a happy number.

It is not a de Polignac number, because 25686081 - 2² = 25686077 is a prime.

It is a super-2 number, since 2×25686081² = 1319549514277122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25686041) 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 11 ways as a sum of consecutive naturals, for example, 74935 + ... + 75276.

Almost surely, 2^25686081 is an apocalyptic number.

It is an amenable number.

25686081 is a deficient number, since it is larger than the sum of its proper divisors (13369039).

25686081 is a wasteful number, since it uses less digits than its factorization.

25686081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150236 (or 150233 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 25686081 is about 5068.1437430286. The cubic root of 25686081 is about 295.0524889844.

It can be divided in two parts, 2568 and 6081, that added together give a square (8649 = 93²).

The spelling of 25686081 in words is "twenty-five million, six hundred eighty-six thousand, eighty-one".