861141 has 4 divisors (see below), whose sum is σ = 1148192. Its totient is φ = 574092.

The previous prime is 861139. The next prime is 861163. The reversal of 861141 is 141168.

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 not a de Polignac number, because 861141 - 2¹ = 861139 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861121) by changing a digit.

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, 143521 + ... + 143526.

It is an arithmetic number, because the mean of its divisors is an integer number (287048).

2⁸⁶¹¹⁴¹ is an apocalyptic number.

It is an amenable number.

861141 is a deficient number, since it is larger than the sum of its proper divisors (287051).

861141 is a wasteful number, since it uses less digits than its factorization.

861141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287050.

The product of its digits is 192, while the sum is 21.

The square root of 861141 is about 927.9768316073. The cubic root of 861141 is about 95.1388919444.

The spelling of 861141 in words is "eight hundred sixty-one thousand, one hundred forty-one".