861006 has 8 divisors (see below), whose sum is σ = 1722024. Its totient is φ = 287000.

The previous prime is 861001. The next prime is 861013. The reversal of 861006 is 600168.

861006 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

861006 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861001) by changing a digit.

861006 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71745 + ... + 71756.

It is an arithmetic number, because the mean of its divisors is an integer number (215253).

2⁸⁶¹⁰⁰⁶ is an apocalyptic number.

861006 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

861006 is a wasteful number, since it uses less digits than its factorization.

861006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143506.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 861006 is about 927.9040898714. The cubic root of 861006 is about 95.1339200828.

The spelling of 861006 in words is "eight hundred sixty-one thousand, six".