25856081 has 8 divisors (see below), whose sum is σ = 27471720. Its totient is φ = 24288768.

The previous prime is 25856059. The next prime is 25856111. The reversal of 25856081 is 18065852.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13075456 + 12780625 = 3616^2 + 3575^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25856081 is a prime.

It is a super-2 number, since 2×25856081² = 1337073849357122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25856021) 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, 10976 + ... + 13121.

It is an arithmetic number, because the mean of its divisors is an integer number (3433965).

Almost surely, 2^25856081 is an apocalyptic number.

It is an amenable number.

25856081 is a deficient number, since it is larger than the sum of its proper divisors (1615639).

25856081 is a wasteful number, since it uses less digits than its factorization.

25856081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24163.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 25856081 is about 5084.8875110468. The cubic root of 25856081 is about 295.7019804532.

The spelling of 25856081 in words is "twenty-five million, eight hundred fifty-six thousand, eighty-one".