25558085 has 16 divisors (see below), whose sum is σ = 35628672. Its totient is φ = 17236800.

The previous prime is 25558081. The next prime is 25558121. The reversal of 25558085 is 58085552.

It is not a de Polignac number, because 25558085 - 2² = 25558081 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25558081) 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 in 15 ways as a sum of consecutive naturals, for example, 3851 + ... + 8120.

It is an arithmetic number, because the mean of its divisors is an integer number (2226792).

Almost surely, 2^25558085 is an apocalyptic number.

It is an amenable number.

25558085 is a deficient number, since it is larger than the sum of its proper divisors (10070587).

25558085 is a wasteful number, since it uses less digits than its factorization.

25558085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12044.

The product of its (nonzero) digits is 80000, while the sum is 38.

The square root of 25558085 is about 5055.5004697854. The cubic root of 25558085 is about 294.5615818366.

It can be divided in two parts, 2555808 and 5, that multiplied together give a triangular number (12779040 = T₅₀₅₅).

The spelling of 25558085 in words is "twenty-five million, five hundred fifty-eight thousand, eighty-five".