861612 has 24 divisors (see below), whose sum is σ = 2116800. Its totient is φ = 272016.

The previous prime is 861599. The next prime is 861613. The reversal of 861612 is 216168.

861612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (861613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1662 + ... + 2117.

It is an arithmetic number, because the mean of its divisors is an integer number (88200).

2⁸⁶¹⁶¹² is an apocalyptic number.

It is an amenable number.

861612 is an abundant number, since it is smaller than the sum of its proper divisors (1255188).

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

861612 is a wasteful number, since it uses less digits than its factorization.

861612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3805 (or 3803 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 861612 is about 928.2305748035. The cubic root of 861612 is about 95.1562341492.

The spelling of 861612 in words is "eight hundred sixty-one thousand, six hundred twelve".