859409 has 8 divisors (see below), whose sum is σ = 887808. Its totient is φ = 831600.

The previous prime is 859393. The next prime is 859423. The reversal of 859409 is 904958.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 859409 - 2⁴ = 859393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (859459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6704 + ... + 6830.

It is an arithmetic number, because the mean of its divisors is an integer number (110976).

2⁸⁵⁹⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

859409 is a deficient number, since it is larger than the sum of its proper divisors (28399).

859409 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (859408) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (295).

859409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 859409 is about 927.0431489418. The cubic root of 859409 is about 95.0750653244.

The spelling of 859409 in words is "eight hundred fifty-nine thousand, four hundred nine".