25885981 has 8 divisors (see below), whose sum is σ = 28327104. Its totient is φ = 23459520.

The previous prime is 25885973. The next prime is 25886033. The reversal of 25885981 is 18958852.

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

It is a cyclic number.

It is not a de Polignac number, because 25885981 - 2³ = 25885973 is a prime.

It is a super-2 number, since 2×25885981² = 1340168024664722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25885901) 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, 216 + ... + 7198.

It is an arithmetic number, because the mean of its divisors is an integer number (3540888).

Almost surely, 2^25885981 is an apocalyptic number.

It is an amenable number.

25885981 is a deficient number, since it is larger than the sum of its proper divisors (2441123).

25885981 is a wasteful number, since it uses less digits than its factorization.

25885981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7331.

The product of its digits is 230400, while the sum is 46.

The square root of 25885981 is about 5087.8267462641. The cubic root of 25885981 is about 295.8159199078.

The spelling of 25885981 in words is "twenty-five million, eight hundred eighty-five thousand, nine hundred eighty-one".