25968981 has 8 divisors (see below), whose sum is σ = 35193184. Its totient is φ = 17028720.

The previous prime is 25968977. The next prime is 25968989. The reversal of 25968981 is 18986952.

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 25968981 - 2² = 25968977 is a prime.

It is a super-2 number, since 2×25968981² = 1348775948356722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25968981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25968989) 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, 70771 + ... + 71136.

It is an arithmetic number, because the mean of its divisors is an integer number (4399148).

Almost surely, 2^25968981 is an apocalyptic number.

It is an amenable number.

25968981 is a deficient number, since it is larger than the sum of its proper divisors (9224203).

25968981 is a wasteful number, since it uses less digits than its factorization.

25968981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141971.

The product of its digits is 311040, while the sum is 48.

The square root of 25968981 is about 5095.9769426480. The cubic root of 25968981 is about 296.1317475664.

The spelling of 25968981 in words is "twenty-five million, nine hundred sixty-eight thousand, nine hundred eighty-one".