25945881 has 8 divisors (see below), whose sum is σ = 37255680. Its totient is φ = 15966672.

The previous prime is 25945841. The next prime is 25945889. The reversal of 25945881 is 18854952.

It is a happy number.

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

It is not a de Polignac number, because 25945881 - 2⁷ = 25945753 is a prime.

It is a super-2 number, since 2×25945881² = 1346377481732322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (25945889) 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, 332601 + ... + 332678.

It is an arithmetic number, because the mean of its divisors is an integer number (4656960).

Almost surely, 2^25945881 is an apocalyptic number.

It is an amenable number.

25945881 is a deficient number, since it is larger than the sum of its proper divisors (11309799).

25945881 is a wasteful number, since it uses less digits than its factorization.

25945881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665295.

The product of its digits is 115200, while the sum is 42.

The square root of 25945881 is about 5093.7099446278. The cubic root of 25945881 is about 296.0439162074.

The spelling of 25945881 in words is "twenty-five million, nine hundred forty-five thousand, eight hundred eighty-one".