856047 has 8 divisors (see below), whose sum is σ = 1157760. Its totient is φ = 562520.

The previous prime is 856043. The next prime is 856057. The reversal of 856047 is 740658.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 856047 - 2² = 856043 is a prime.

856047 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856043) 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, 1797 + ... + 2222.

It is an arithmetic number, because the mean of its divisors is an integer number (144720).

2⁸⁵⁶⁰⁴⁷ is an apocalyptic number.

856047 is a deficient number, since it is larger than the sum of its proper divisors (301713).

856047 is a wasteful number, since it uses less digits than its factorization.

856047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4093.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 856047 is about 925.2280799889. The cubic root of 856047 is about 94.9509257159.

The spelling of 856047 in words is "eight hundred fifty-six thousand, forty-seven".