25904965 has 4 divisors (see below), whose sum is σ = 31085964. Its totient is φ = 20723968.

The previous prime is 25904959. The next prime is 25904987. The reversal of 25904965 is 56940952.

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 2614689 + 23290276 = 1617^2 + 4826^2 .

It is a cyclic number.

It is not a de Polignac number, because 25904965 - 2¹⁷ = 25773893 is a prime.

It is a Smith number, since the sum of its digits (40) 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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2590492 + ... + 2590501.

It is an arithmetic number, because the mean of its divisors is an integer number (7771491).

Almost surely, 2^25904965 is an apocalyptic number.

It is an amenable number.

25904965 is a deficient number, since it is larger than the sum of its proper divisors (5180999).

25904965 is an equidigital number, since it uses as much as digits as its factorization.

25904965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5180998.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 25904965 is about 5089.6920339054. The cubic root of 25904965 is about 295.8882164039. Note that the first 3 decimals are identical.

The spelling of 25904965 in words is "twenty-five million, nine hundred four thousand, nine hundred sixty-five".