25609841 has 4 divisors (see below), whose sum is σ = 25620132. Its totient is φ = 25599552.

The previous prime is 25609799. The next prime is 25609847. The reversal of 25609841 is 14890652.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 23001616 + 2608225 = 4796^2 + 1615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25609841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25609847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1181 + ... + 7253.

It is an arithmetic number, because the mean of its divisors is an integer number (6405033).

Almost surely, 2^25609841 is an apocalyptic number.

It is an amenable number.

25609841 is a deficient number, since it is larger than the sum of its proper divisors (10291).

25609841 is an equidigital number, since it uses as much as digits as its factorization.

25609841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10290.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 25609841 is about 5060.6166620285. The cubic root of 25609841 is about 294.7602802135.

The spelling of 25609841 in words is "twenty-five million, six hundred nine thousand, eight hundred forty-one".