864534 has 16 divisors (see below), whose sum is σ = 1886400. Its totient is φ = 261960.

The previous prime is 864533. The next prime is 864541. The reversal of 864534 is 435468.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864533) 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, 6484 + ... + 6615.

It is an arithmetic number, because the mean of its divisors is an integer number (117900).

2⁸⁶⁴⁵³⁴ is an apocalyptic number.

864534 is an abundant number, since it is smaller than the sum of its proper divisors (1021866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

864534 is a wasteful number, since it uses less digits than its factorization.

864534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13115.

The product of its digits is 11520, while the sum is 30.

The square root of 864534 is about 929.8032049848. The cubic root of 864534 is about 95.2636811178.

The spelling of 864534 in words is "eight hundred sixty-four thousand, five hundred thirty-four".