864087 has 16 divisors (see below), whose sum is σ = 1374720. Its totient is φ = 472032.

The previous prime is 864079. The next prime is 864091. The reversal of 864087 is 780468.

It is not a de Polignac number, because 864087 - 2³ = 864079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864007) 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, 412 + ... + 1377.

It is an arithmetic number, because the mean of its divisors is an integer number (85920).

2⁸⁶⁴⁰⁸⁷ is an apocalyptic number.

864087 is a deficient number, since it is larger than the sum of its proper divisors (510633).

864087 is a wasteful number, since it uses less digits than its factorization.

864087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1822.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 864087 is about 929.5628004605. The cubic root of 864087 is about 95.2472598601.

The spelling of 864087 in words is "eight hundred sixty-four thousand, eighty-seven".