125859 has 4 divisors (see below), whose sum is σ = 167816. Its totient is φ = 83904.

The previous prime is 125821. The next prime is 125863. The reversal of 125859 is 958521.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 125859 - 2⁷ = 125731 is a prime.

It is a D-number.

It is a Duffinian number.

125859 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 125859.

It is not an unprimeable number, because it can be changed into a prime (125899) 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 in 3 ways as a sum of consecutive naturals, for example, 20974 + ... + 20979.

It is an arithmetic number, because the mean of its divisors is an integer number (41954).

2¹²⁵⁸⁵⁹ is an apocalyptic number.

125859 is a deficient number, since it is larger than the sum of its proper divisors (41957).

125859 is an equidigital number, since it uses as much as digits as its factorization.

125859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41956.

The product of its digits is 3600, while the sum is 30.

The square root of 125859 is about 354.7661201411. The cubic root of 125859 is about 50.1142719727.

The spelling of 125859 in words is "one hundred twenty-five thousand, eight hundred fifty-nine".