25804049 has 4 divisors (see below), whose sum is σ = 25968564. Its totient is φ = 25639536.

The previous prime is 25804039. The next prime is 25804067. The reversal of 25804049 is 94040852.

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 4579600 + 21224449 = 2140^2 + 4607^2 .

It is a cyclic number.

It is not a de Polignac number, because 25804049 - 2¹² = 25799953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25804019) 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, 82022 + ... + 82335.

It is an arithmetic number, because the mean of its divisors is an integer number (6492141).

Almost surely, 2^25804049 is an apocalyptic number.

It is an amenable number.

25804049 is a deficient number, since it is larger than the sum of its proper divisors (164515).

25804049 is a wasteful number, since it uses less digits than its factorization.

25804049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164514.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 25804049 is about 5079.7685970918. The cubic root of 25804049 is about 295.5034933256.

The spelling of 25804049 in words is "twenty-five million, eight hundred four thousand, forty-nine".