25936861 has 4 divisors (see below), whose sum is σ = 26048412. Its totient is φ = 25825312.

The previous prime is 25936831. The next prime is 25936873. The reversal of 25936861 is 16863952.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13468900 + 12467961 = 3670^2 + 3531^2 .

It is a cyclic number.

It is not a de Polignac number, because 25936861 - 2¹¹ = 25934813 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 (25936811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55426 + ... + 55891.

It is an arithmetic number, because the mean of its divisors is an integer number (6512103).

Almost surely, 2^25936861 is an apocalyptic number.

It is an amenable number.

25936861 is a deficient number, since it is larger than the sum of its proper divisors (111551).

25936861 is a wasteful number, since it uses less digits than its factorization.

25936861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111550.

The product of its digits is 77760, while the sum is 40.

The square root of 25936861 is about 5092.8244619268. The cubic root of 25936861 is about 296.0096060006.

The spelling of 25936861 in words is "twenty-five million, nine hundred thirty-six thousand, eight hundred sixty-one".