861127 has 4 divisors (see below), whose sum is σ = 864360. Its totient is φ = 857896.

The previous prime is 861121. The next prime is 861131. The reversal of 861127 is 721168.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-861127 is a prime.

It is an Ulam number.

It is a Duffinian 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, 1177 + ... + 1762.

It is an arithmetic number, because the mean of its divisors is an integer number (216090).

2⁸⁶¹¹²⁷ is an apocalyptic number.

861127 is a deficient number, since it is larger than the sum of its proper divisors (3233).

861127 is a wasteful number, since it uses less digits than its factorization.

861127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3232.

The product of its digits is 672, while the sum is 25.

The square root of 861127 is about 927.9692882849. The cubic root of 861127 is about 95.1383763680.

The spelling of 861127 in words is "eight hundred sixty-one thousand, one hundred twenty-seven".