25645385 has 4 divisors (see below), whose sum is σ = 30774468. Its totient is φ = 20516304.

The previous prime is 25645357. The next prime is 25645397. The reversal of 25645385 is 58354652.

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 11888704 + 13756681 = 3448^2 + 3709^2 .

It is a cyclic number.

It is not a de Polignac number, because 25645385 - 2¹⁰ = 25644361 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2564534 + ... + 2564543.

It is an arithmetic number, because the mean of its divisors is an integer number (7693617).

Almost surely, 2^25645385 is an apocalyptic number.

It is an amenable number.

25645385 is a deficient number, since it is larger than the sum of its proper divisors (5129083).

25645385 is an equidigital number, since it uses as much as digits as its factorization.

25645385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5129082.

The product of its digits is 144000, while the sum is 38.

The square root of 25645385 is about 5064.1272693328. The cubic root of 25645385 is about 294.8965834954.

The spelling of 25645385 in words is "twenty-five million, six hundred forty-five thousand, three hundred eighty-five".