864171 has 48 divisors (see below), whose sum is σ = 1647360. Its totient is φ = 423360.

The previous prime is 864169. The next prime is 864191. The reversal of 864171 is 171468.

It is a happy number.

It is not a de Polignac number, because 864171 - 2¹ = 864169 is a prime.

Its product of digits (1344) is a multiple of the sum of its prime factors (96).

It is not an unprimeable number, because it can be changed into a prime (864121) 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 47 ways as a sum of consecutive naturals, for example, 20076 + ... + 20118.

It is an arithmetic number, because the mean of its divisors is an integer number (34320).

2⁸⁶⁴¹⁷¹ is an apocalyptic number.

864171 is a deficient number, since it is larger than the sum of its proper divisors (783189).

864171 is a wasteful number, since it uses less digits than its factorization.

864171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 93 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 864171 is about 929.6079818934. The cubic root of 864171 is about 95.2503461661.

It can be divided in two parts, 864 and 171, that added together give a triangular number (1035 = T₄₅).

The spelling of 864171 in words is "eight hundred sixty-four thousand, one hundred seventy-one".