864055 has 16 divisors (see below), whose sum is σ = 1101600. Its totient is φ = 649600.

The previous prime is 864053. The next prime is 864077. The reversal of 864055 is 550468.

864055 = 20² + 21² + ... + 137².

It is not a de Polignac number, because 864055 - 2¹ = 864053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864053) 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 15 ways as a sum of consecutive naturals, for example, 8505 + ... + 8605.

It is an arithmetic number, because the mean of its divisors is an integer number (68850).

2⁸⁶⁴⁰⁵⁵ is an apocalyptic number.

864055 is a deficient number, since it is larger than the sum of its proper divisors (237545).

864055 is a wasteful number, since it uses less digits than its factorization.

864055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 864055 is about 929.5455879084. The cubic root of 864055 is about 95.2460840719.

The spelling of 864055 in words is "eight hundred sixty-four thousand, fifty-five".