864535 has 16 divisors (see below), whose sum is σ = 1256256. Its totient is φ = 557568.

The previous prime is 864533. The next prime is 864541. The reversal of 864535 is 535468.

864535 = T₉₈ + T₉₉ + ... + T₁₈₂.

864535 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a 9-Lehmer number, since φ(864535) divides (864535-1)⁹.

It is a cyclic number.

It is not a de Polignac number, because 864535 - 2¹ = 864533 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 864497 and 864506.

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 15 ways as a sum of consecutive naturals, for example, 132 + ... + 1321.

It is an arithmetic number, because the mean of its divisors is an integer number (78516).

2⁸⁶⁴⁵³⁵ is an apocalyptic number.

864535 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

864535 is a deficient number, since it is larger than the sum of its proper divisors (391721).

864535 is a wasteful number, since it uses less digits than its factorization.

864535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482.

The product of its digits is 14400, while the sum is 31.

The square root of 864535 is about 929.8037427328. The cubic root of 864535 is about 95.2637178480.

The spelling of 864535 in words is "eight hundred sixty-four thousand, five hundred thirty-five".