859405 has 4 divisors (see below), whose sum is σ = 1031292. Its totient is φ = 687520.

The previous prime is 859393. The next prime is 859423. The reversal of 859405 is 504958.

859405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 477481 + 381924 = 691^2 + 618^2 .

It is not a de Polignac number, because 859405 - 2⁵ = 859373 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85936 + ... + 85945.

It is an arithmetic number, because the mean of its divisors is an integer number (257823).

2⁸⁵⁹⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

859405 is a deficient number, since it is larger than the sum of its proper divisors (171887).

859405 is a wasteful number, since it uses less digits than its factorization.

859405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171886.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 859405 is about 927.0409915424. The cubic root of 859405 is about 95.0749178196.

The spelling of 859405 in words is "eight hundred fifty-nine thousand, four hundred five".