865434 has 16 divisors (see below), whose sum is σ = 1749888. Its totient is φ = 285312.

The previous prime is 865409. The next prime is 865457. The reversal of 865434 is 434568.

865434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 865434.

It is an unprimeable number.

865434 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162 + ... + 1325.

It is an arithmetic number, because the mean of its divisors is an integer number (109368).

2⁸⁶⁵⁴³⁴ is an apocalyptic number.

865434 is an abundant number, since it is smaller than the sum of its proper divisors (884454).

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

865434 is a wasteful number, since it uses less digits than its factorization.

865434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589.

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

The square root of 865434 is about 930.2870524736. The cubic root of 865434 is about 95.2967268891.

The spelling of 865434 in words is "eight hundred sixty-five thousand, four hundred thirty-four".