861061 has 4 divisors (see below), whose sum is σ = 906400. Its totient is φ = 815724.

The previous prime is 861059. The next prime is 861079. The reversal of 861061 is 160168.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 861061 - 2¹ = 861059 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 (861001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22641 + ... + 22678.

It is an arithmetic number, because the mean of its divisors is an integer number (226600).

2⁸⁶¹⁰⁶¹ is an apocalyptic number.

It is an amenable number.

861061 is a deficient number, since it is larger than the sum of its proper divisors (45339).

861061 is a wasteful number, since it uses less digits than its factorization.

861061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45338.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 861061 is about 927.9337260818. The cubic root of 861061 is about 95.1359457187.

The spelling of 861061 in words is "eight hundred sixty-one thousand, sixty-one".