25611065 has 4 divisors (see below), whose sum is σ = 30733284. Its totient is φ = 20488848.

The previous prime is 25611059. The next prime is 25611073. The reversal of 25611065 is 56011652.

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 17131321 + 8479744 = 4139^2 + 2912^2 .

It is a cyclic number.

It is not a de Polignac number, because 25611065 - 2¹² = 25606969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2561102 + ... + 2561111.

It is an arithmetic number, because the mean of its divisors is an integer number (7683321).

Almost surely, 2^25611065 is an apocalyptic number.

It is an amenable number.

25611065 is a deficient number, since it is larger than the sum of its proper divisors (5122219).

25611065 is an equidigital number, since it uses as much as digits as its factorization.

25611065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5122218.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 25611065 is about 5060.7375944619. The cubic root of 25611065 is about 294.7649760755.

The spelling of 25611065 in words is "twenty-five million, six hundred eleven thousand, sixty-five".