25961839 has 8 divisors (see below), whose sum is σ = 27533520. Its totient is φ = 24395136.

The previous prime is 25961833. The next prime is 25961843. The reversal of 25961839 is 93816952.

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 25961839 - 2¹⁹ = 25437551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25961795 and 25961804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25961833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19992 + ... + 21250.

It is an arithmetic number, because the mean of its divisors is an integer number (3441690).

Almost surely, 2^25961839 is an apocalyptic number.

25961839 is a deficient number, since it is larger than the sum of its proper divisors (1571681).

25961839 is a wasteful number, since it uses less digits than its factorization.

25961839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2489.

The product of its digits is 116640, while the sum is 43.

The square root of 25961839 is about 5095.2761456078. The cubic root of 25961839 is about 296.1045976517.

The spelling of 25961839 in words is "twenty-five million, nine hundred sixty-one thousand, eight hundred thirty-nine".