25525805 has 4 divisors (see below), whose sum is σ = 30630972. Its totient is φ = 20420640.

The previous prime is 25525793. The next prime is 25525811. The reversal of 25525805 is 50852552.

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 19245769 + 6280036 = 4387^2 + 2506^2 .

It is not a de Polignac number, because 25525805 - 2²⁴ = 8748589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2552576 + ... + 2552585.

It is an arithmetic number, because the mean of its divisors is an integer number (7657743).

Almost surely, 2^25525805 is an apocalyptic number.

It is an amenable number.

25525805 is a deficient number, since it is larger than the sum of its proper divisors (5105167).

25525805 is an equidigital number, since it uses as much as digits as its factorization.

25525805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5105166.

The product of its (nonzero) digits is 20000, while the sum is 32.

The square root of 25525805 is about 5052.3068988334. The cubic root of 25525805 is about 294.4375186325.

The spelling of 25525805 in words is "twenty-five million, five hundred twenty-five thousand, eight hundred five".