864205 has 8 divisors (see below), whose sum is σ = 1042272. Its totient is φ = 687888.

The previous prime is 864203. The next prime is 864211. The reversal of 864205 is 502468.

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 864205 - 2¹ = 864203 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 864205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1254 + ... + 1816.

It is an arithmetic number, because the mean of its divisors is an integer number (130284).

2⁸⁶⁴²⁰⁵ is an apocalyptic number.

It is an amenable number.

864205 is a deficient number, since it is larger than the sum of its proper divisors (178067).

864205 is a wasteful number, since it uses less digits than its factorization.

864205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 864205 is about 929.6262689920. The cubic root of 864205 is about 95.2515953283.

The spelling of 864205 in words is "eight hundred sixty-four thousand, two hundred five".