25805825 has 6 divisors (see below), whose sum is σ = 31999254. Its totient is φ = 20644640.

The previous prime is 25805777. The next prime is 25805827. The reversal of 25805825 is 52850852.

It can be written as a sum of positive squares in 3 ways, for example, as 1874161 + 23931664 = 1369^2 + 4892^2 .

It is not a de Polignac number, because 25805825 - 2⁸ = 25805569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25805827) 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, 516092 + ... + 516141.

It is an arithmetic number, because the mean of its divisors is an integer number (5333209).

Almost surely, 2^25805825 is an apocalyptic number.

25805825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25805825 is a deficient number, since it is larger than the sum of its proper divisors (6193429).

25805825 is a wasteful number, since it uses less digits than its factorization.

25805825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032243 (or 1032238 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 35.

The square root of 25805825 is about 5079.9434051966. The cubic root of 25805825 is about 295.5102726513.

The spelling of 25805825 in words is "twenty-five million, eight hundred five thousand, eight hundred twenty-five".