25961589 has 6 divisors (see below), whose sum is σ = 37500086. Its totient is φ = 17307720.

The previous prime is 25961563. The next prime is 25961597. The reversal of 25961589 is 98516952.

25961589 is a `hidden beast` number, since 2 + 5 + 9 + 61 + 589 = 666.

It can be written as a sum of positive squares in only one way, i.e., 25583364 + 378225 = 5058^2 + 615^2 .

It is not a de Polignac number, because 25961589 - 2⁷ = 25961461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25961599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1442302 + ... + 1442319.

Almost surely, 2^25961589 is an apocalyptic number.

It is an amenable number.

25961589 is a deficient number, since it is larger than the sum of its proper divisors (11538497).

25961589 is a wasteful number, since it uses less digits than its factorization.

25961589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2884627 (or 2884624 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 25961589 is about 5095.2516130217. The cubic root of 25961589 is about 296.1036472004.

The spelling of 25961589 in words is "twenty-five million, nine hundred sixty-one thousand, five hundred eighty-nine".