25803559 has 2 divisors, whose sum is σ = 25803560. Its totient is φ = 25803558.

The previous prime is 25803551. The next prime is 25803607. The reversal of 25803559 is 95530852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25803559 - 2³ = 25803551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25803551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12901779 + 12901780.

It is an arithmetic number, because the mean of its divisors is an integer number (12901780).

Almost surely, 2^25803559 is an apocalyptic number.

25803559 is a deficient number, since it is larger than the sum of its proper divisors (1).

25803559 is an equidigital number, since it uses as much as digits as its factorization.

25803559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 25803559 is about 5079.7203663194. The cubic root of 25803559 is about 295.5016228487.

It can be divided in two parts, 25803 and 559, that added together give a palindrome (26362).

The spelling of 25803559 in words is "twenty-five million, eight hundred three thousand, five hundred fifty-nine".