861140 has 24 divisors (see below), whose sum is σ = 2067072. Its totient is φ = 295200.

The previous prime is 861139. The next prime is 861163. The reversal of 861140 is 41168.

861140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2936 + ... + 3215.

It is an arithmetic number, because the mean of its divisors is an integer number (86128).

2⁸⁶¹¹⁴⁰ is an apocalyptic number.

It is an amenable number.

861140 is an abundant number, since it is smaller than the sum of its proper divisors (1205932).

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

861140 is a wasteful number, since it uses less digits than its factorization.

861140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6167 (or 6165 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 861140 is about 927.9762928006. The cubic root of 861140 is about 95.1388551177.

It can be divided in two parts, 861 and 140, that added together give a palindrome (1001).

The spelling of 861140 in words is "eight hundred sixty-one thousand, one hundred forty".