25644601 has 4 divisors (see below), whose sum is σ = 25682832. Its totient is φ = 25606372.

The previous prime is 25644581. The next prime is 25644629. The reversal of 25644601 is 10644652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25644601 - 2⁹ = 25644089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25644601.

It is not an unprimeable number, because it can be changed into a prime (25644401) 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 3 ways as a sum of consecutive naturals, for example, 18091 + ... + 19456.

It is an arithmetic number, because the mean of its divisors is an integer number (6420708).

Almost surely, 2^25644601 is an apocalyptic number.

It is an amenable number.

25644601 is a deficient number, since it is larger than the sum of its proper divisors (38231).

25644601 is an equidigital number, since it uses as much as digits as its factorization.

25644601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38230.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 25644601 is about 5064.0498615239. The cubic root of 25644601 is about 294.8935783897.

The spelling of 25644601 in words is "twenty-five million, six hundred forty-four thousand, six hundred one".