856561127 has 8 divisors (see below), whose sum is σ = 864921072. Its totient is φ = 848232000.

The previous prime is 856561087. The next prime is 856561129. The reversal of 856561127 is 721165658.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-856561127 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 (856561129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50252 + ... + 65102.

It is an arithmetic number, because the mean of its divisors is an integer number (108115134).

Almost surely, 2^856561127 is an apocalyptic number.

856561127 is a deficient number, since it is larger than the sum of its proper divisors (8359945).

856561127 is a wasteful number, since it uses less digits than its factorization.

856561127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15409.

The product of its digits is 100800, while the sum is 41.

The square root of 856561127 is about 29267.0655686558. The cubic root of 856561127 is about 949.6993053880.

The spelling of 856561127 in words is "eight hundred fifty-six million, five hundred sixty-one thousand, one hundred twenty-seven".