861041 has 4 divisors (see below), whose sum is σ = 882084. Its totient is φ = 840000.

The previous prime is 861037. The next prime is 861043. The reversal of 861041 is 140168.

861041 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 102400 + 758641 = 320^2 + 871^2 .

It is a cyclic number.

It is not a de Polignac number, because 861041 - 2² = 861037 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861043) 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, 10460 + ... + 10541.

It is an arithmetic number, because the mean of its divisors is an integer number (220521).

2⁸⁶¹⁰⁴¹ is an apocalyptic number.

It is an amenable number.

861041 is a deficient number, since it is larger than the sum of its proper divisors (21043).

861041 is a wasteful number, since it uses less digits than its factorization.

861041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21042.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 861041 is about 927.9229493875. The cubic root of 861041 is about 95.1352091338.

The spelling of 861041 in words is "eight hundred sixty-one thousand, forty-one".