25644841 has 2 divisors, whose sum is σ = 25644842. Its totient is φ = 25644840.

The previous prime is 25644833. The next prime is 25644847. The reversal of 25644841 is 14844652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14220441 + 11424400 = 3771^2 + 3380^2 .

It is a cyclic number.

It is not a de Polignac number, because 25644841 - 2³ = 25644833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25644797 and 25644806.

It is not a weakly prime, because it can be changed into another prime (25644847) 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 as a sum of consecutive naturals, namely, 12822420 + 12822421.

It is an arithmetic number, because the mean of its divisors is an integer number (12822421).

Almost surely, 2^25644841 is an apocalyptic number.

It is an amenable number.

25644841 is a deficient number, since it is larger than the sum of its proper divisors (1).

25644841 is an equidigital number, since it uses as much as digits as its factorization.

25644841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30720, while the sum is 34.

The square root of 25644841 is about 5064.0735579176. The cubic root of 25644841 is about 294.8944983265.

The spelling of 25644841 in words is "twenty-five million, six hundred forty-four thousand, eight hundred forty-one".