864135 has 32 divisors (see below), whose sum is σ = 1586880. Its totient is φ = 445824.

The previous prime is 864131. The next prime is 864137. The reversal of 864135 is 531468.

864135 is nontrivially palindromic in base 4.

It is not a de Polignac number, because 864135 - 2² = 864131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 864099 and 864108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4909 + ... + 5081.

It is an arithmetic number, because the mean of its divisors is an integer number (49590).

2⁸⁶⁴¹³⁵ is an apocalyptic number.

864135 is a deficient number, since it is larger than the sum of its proper divisors (722745).

864135 is a wasteful number, since it uses less digits than its factorization.

864135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 218 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 864135 is about 929.5886186911. The cubic root of 864135 is about 95.2490234880.

It can be divided in two parts, 864 and 135, that added together give a palindrome (999).

The spelling of 864135 in words is "eight hundred sixty-four thousand, one hundred thirty-five".