861077 has 6 divisors (see below), whose sum is σ = 1001718. Its totient is φ = 738024.

The previous prime is 861059. The next prime is 861079. The reversal of 861077 is 770168.

861077 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 790321 + 70756 = 889^2 + 266^2 .

It is not a de Polignac number, because 861077 - 2⁶ = 861013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861079) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8738 + ... + 8835.

It is an arithmetic number, because the mean of its divisors is an integer number (166953).

2⁸⁶¹⁰⁷⁷ is an apocalyptic number.

It is an amenable number.

861077 is a deficient number, since it is larger than the sum of its proper divisors (140641).

861077 is a wasteful number, since it uses less digits than its factorization.

861077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17587 (or 17580 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 861077 is about 927.9423473471. The cubic root of 861077 is about 95.1365349785.

Subtracting from 861077 its reverse (770168), we obtain a palindrome (90909).

The spelling of 861077 in words is "eight hundred sixty-one thousand, seventy-seven".