25805541 has 16 divisors (see below), whose sum is σ = 37122624. Its totient is φ = 15884544.

The previous prime is 25805537. The next prime is 25805543. The reversal of 25805541 is 14550852.

It is not a de Polignac number, because 25805541 - 2² = 25805537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25805499 and 25805508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25805543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2071 + ... + 7476.

It is an arithmetic number, because the mean of its divisors is an integer number (2320164).

Almost surely, 2^25805541 is an apocalyptic number.

It is an amenable number.

25805541 is a deficient number, since it is larger than the sum of its proper divisors (11317083).

25805541 is a wasteful number, since it uses less digits than its factorization.

25805541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9620.

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 25805541 is about 5079.9154520523. The cubic root of 25805541 is about 295.5091885909.

The spelling of 25805541 in words is "twenty-five million, eight hundred five thousand, five hundred forty-one".