861095 has 4 divisors (see below), whose sum is σ = 1033320. Its totient is φ = 688872.

The previous prime is 861089. The next prime is 861109. The reversal of 861095 is 590168.

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

It is a cyclic number.

It is not a de Polignac number, because 861095 - 2⁴ = 861079 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86105 + ... + 86114.

It is an arithmetic number, because the mean of its divisors is an integer number (258330).

2⁸⁶¹⁰⁹⁵ is an apocalyptic number.

861095 is a deficient number, since it is larger than the sum of its proper divisors (172225).

861095 is a wasteful number, since it uses less digits than its factorization.

861095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172224.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 861095 is about 927.9520461748. The cubic root of 861095 is about 95.1371978869.

The spelling of 861095 in words is "eight hundred sixty-one thousand, ninety-five".