25641859 has 2 divisors, whose sum is σ = 25641860. Its totient is φ = 25641858.

The previous prime is 25641841. The next prime is 25641871. The reversal of 25641859 is 95814652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25641859 - 2⁷ = 25641731 is a prime.

It is not a weakly prime, because it can be changed into another prime (25641839) by changing a digit.

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 as a sum of consecutive naturals, namely, 12820929 + 12820930.

It is an arithmetic number, because the mean of its divisors is an integer number (12820930).

Almost surely, 2^25641859 is an apocalyptic number.

25641859 is a deficient number, since it is larger than the sum of its proper divisors (1).

25641859 is an equidigital number, since it uses as much as digits as its factorization.

25641859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 40.

The square root of 25641859 is about 5063.7791223552. The cubic root of 25641859 is about 294.8830677041.

The spelling of 25641859 in words is "twenty-five million, six hundred forty-one thousand, eight hundred fifty-nine".