25804039 has 2 divisors, whose sum is σ = 25804040. Its totient is φ = 25804038.

The previous prime is 25804021. The next prime is 25804067. The reversal of 25804039 is 93040852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25804039 - 2¹¹ = 25801991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25804039.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25804019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12902019 + 12902020.

It is an arithmetic number, because the mean of its divisors is an integer number (12902020).

Almost surely, 2^25804039 is an apocalyptic number.

25804039 is a deficient number, since it is larger than the sum of its proper divisors (1).

25804039 is an equidigital number, since it uses as much as digits as its factorization.

25804039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 25804039 is about 5079.7676127949. The cubic root of 25804039 is about 295.5034551528.

The spelling of 25804039 in words is "twenty-five million, eight hundred four thousand, thirty-nine".