861306 has 8 divisors (see below), whose sum is σ = 1722624. Its totient is φ = 287100.

The previous prime is 861299. The next prime is 861317. The reversal of 861306 is 603168.

861306 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.

861306 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

861306 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, 71770 + ... + 71781.

It is an arithmetic number, because the mean of its divisors is an integer number (215328).

2⁸⁶¹³⁰⁶ is an apocalyptic number.

861306 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.

861306 is a wasteful number, since it uses less digits than its factorization.

861306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143556.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 861306 is about 928.0657304308. The cubic root of 861306 is about 95.1449679585.

The spelling of 861306 in words is "eight hundred sixty-one thousand, three hundred six".