25085811 has 4 divisors (see below), whose sum is σ = 33447752. Its totient is φ = 16723872.

The previous prime is 25085779. The next prime is 25085831. The reversal of 25085811 is 11858052.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 25085811 - 2⁵ = 25085779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25085831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4180966 + ... + 4180971.

It is an arithmetic number, because the mean of its divisors is an integer number (8361938).

Almost surely, 2^25085811 is an apocalyptic number.

25085811 is a deficient number, since it is larger than the sum of its proper divisors (8361941).

25085811 is an equidigital number, since it uses as much as digits as its factorization.

25085811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8361940.

The product of its (nonzero) digits is 3200, while the sum is 30.

The square root of 25085811 is about 5008.5737490827. The cubic root of 25085811 is about 292.7359422895.

The spelling of 25085811 in words is "twenty-five million, eighty-five thousand, eight hundred eleven".