869405 has 8 divisors (see below), whose sum is σ = 1068984. Its totient is φ = 678400.

The previous prime is 869399. The next prime is 869413. The reversal of 869405 is 504968.

It can be written as a sum of positive squares in 4 ways, for example, as 114244 + 755161 = 338^2 + 869^2 .

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

It is not a de Polignac number, because 869405 - 2¹⁰ = 868381 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 1916 + ... + 2325.

It is an arithmetic number, because the mean of its divisors is an integer number (133623).

2⁸⁶⁹⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

869405 is a deficient number, since it is larger than the sum of its proper divisors (199579).

869405 is a wasteful number, since it uses less digits than its factorization.

869405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4287.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 869405 is about 932.4188972774. The cubic root of 869405 is about 95.4422592584.

The spelling of 869405 in words is "eight hundred sixty-nine thousand, four hundred five".