25825869 has 6 divisors (see below), whose sum is σ = 37304046. Its totient is φ = 17217240.

The previous prime is 25825861. The next prime is 25825871. The reversal of 25825869 is 96852852.

25825869 is a `hidden beast` number, since 2 + 582 + 5 + 8 + 69 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14516100 + 11309769 = 3810^2 + 3363^2 .

It is not a de Polignac number, because 25825869 - 2³ = 25825861 is a prime.

It is a super-2 number, since 2×25825869² = 1333951019210322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25825861) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1434762 + ... + 1434779.

It is an arithmetic number, because the mean of its divisors is an integer number (6217341).

Almost surely, 2^25825869 is an apocalyptic number.

It is an amenable number.

25825869 is a deficient number, since it is larger than the sum of its proper divisors (11478177).

25825869 is a wasteful number, since it uses less digits than its factorization.

25825869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2869547 (or 2869544 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 25825869 is about 5081.9158788788. The cubic root of 25825869 is about 295.5867628107.

The spelling of 25825869 in words is "twenty-five million, eight hundred twenty-five thousand, eight hundred sixty-nine".