25987859 has 2 divisors, whose sum is σ = 25987860. Its totient is φ = 25987858.

The previous prime is 25987847. The next prime is 25987873. The reversal of 25987859 is 95878952.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25987859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25987859.

It is not a weakly prime, because it can be changed into another prime (25987879) 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, 12993929 + 12993930.

It is an arithmetic number, because the mean of its divisors is an integer number (12993930).

Almost surely, 2^25987859 is an apocalyptic number.

25987859 is a deficient number, since it is larger than the sum of its proper divisors (1).

25987859 is an equidigital number, since it uses as much as digits as its factorization.

25987859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 53.

The square root of 25987859 is about 5097.8288515799. The cubic root of 25987859 is about 296.2034872706.

The spelling of 25987859 in words is "twenty-five million, nine hundred eighty-seven thousand, eight hundred fifty-nine".