861546 has 32 divisors (see below), whose sum is σ = 2003328. Its totient is φ = 241920.

The previous prime is 861541. The next prime is 861547. The reversal of 861546 is 645168.

861546 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861541) by changing a digit.

861546 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 15 ways as a sum of consecutive naturals, for example, 2926 + ... + 3206.

It is an arithmetic number, because the mean of its divisors is an integer number (62604).

2⁸⁶¹⁵⁴⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 861546, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1001664).

861546 is an abundant number, since it is smaller than the sum of its proper divisors (1141782).

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

861546 is a wasteful number, since it uses less digits than its factorization.

861546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366.

The product of its digits is 5760, while the sum is 30.

The square root of 861546 is about 928.1950226111. The cubic root of 861546 is about 95.1538044122.

The spelling of 861546 in words is "eight hundred sixty-one thousand, five hundred forty-six".