15859 has 2 divisors, whose sum is σ = 15860.
Its totient is φ = 15858.
The previous prime is 15823. The next prime is 15877. The reversal of 15859 is 95851.
15859 is nontrivially palindromic in base 8.
15859 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 15859 - 27 = 15731 is a prime.
It is not a weakly prime, because it can be changed into another prime (15809) 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, 7929 + 7930.
It is an arithmetic number, because the mean of its divisors is an integer number (7930).
215859 is an apocalyptic number.
15859 is a deficient number, since it is larger than the sum of its proper divisors (1).
15859 is an equidigital number, since it uses as much as digits as its factorization.
15859 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 1800, while the sum is 28.
The square root of 15859 is about 125.9325216138.
The cubic root of 15859 is about 25.1241821306.
The spelling of 15859 in words is "fifteen thousand, eight hundred fifty-nine".