861192 has 48 divisors (see below), whose sum is σ = 2424240. Its totient is φ = 286416.

The previous prime is 861191. The next prime is 861199. The reversal of 861192 is 291168.

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

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (861191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1723 + ... + 2165.

It is an arithmetic number, because the mean of its divisors is an integer number (50505).

2⁸⁶¹¹⁹² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 861192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1212120).

861192 is an abundant number, since it is smaller than the sum of its proper divisors (1563048).

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

861192 is a wasteful number, since it uses less digits than its factorization.

861192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464 (or 448 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 861192 is about 928.0043103348. The cubic root of 861192 is about 95.1407700680.

The spelling of 861192 in words is "eight hundred sixty-one thousand, one hundred ninety-two".