861164 has 24 divisors (see below), whose sum is σ = 1587600. Its totient is φ = 408320.

The previous prime is 861163. The next prime is 861167. The reversal of 861164 is 461168.

It is not an unprimeable number, because it can be changed into a prime (861163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9632 + ... + 9720.

It is an arithmetic number, because the mean of its divisors is an integer number (66150).

2⁸⁶¹¹⁶⁴ is an apocalyptic number.

It is an amenable number.

861164 is a deficient number, since it is larger than the sum of its proper divisors (726436).

861164 is a wasteful number, since it uses less digits than its factorization.

861164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 191 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 861164 is about 927.9892240754. The cubic root of 861164 is about 95.1397389505.

The spelling of 861164 in words is "eight hundred sixty-one thousand, one hundred sixty-four".