25590881 has 8 divisors (see below), whose sum is σ = 26916864. Its totient is φ = 24282720.

The previous prime is 25590871. The next prime is 25590893. The reversal of 25590881 is 18809552.

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-25590881 is a prime.

It is a super-2 number, since 2×25590881² = 1309786380712322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25590821) 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, 1460 + ... + 7301.

It is an arithmetic number, because the mean of its divisors is an integer number (3364608).

Almost surely, 2^25590881 is an apocalyptic number.

25590881 is the 2921-st octagonal number.

It is an amenable number.

25590881 is a deficient number, since it is larger than the sum of its proper divisors (1325983).

25590881 is a wasteful number, since it uses less digits than its factorization.

25590881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8911.

The product of its (nonzero) digits is 28800, while the sum is 38.

The square root of 25590881 is about 5058.7430256932. The cubic root of 25590881 is about 294.6875212736.

The spelling of 25590881 in words is "twenty-five million, five hundred ninety thousand, eight hundred eighty-one".