855047 has 4 divisors (see below), whose sum is σ = 857376. Its totient is φ = 852720.

The previous prime is 855031. The next prime is 855059. The reversal of 855047 is 740558.

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 855047 - 2⁴ = 855031 is a prime.

It is a super-2 number, since 2×855047² = 1462210744418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479 + ... + 1392.

It is an arithmetic number, because the mean of its divisors is an integer number (214344).

2⁸⁵⁵⁰⁴⁷ is an apocalyptic number.

855047 is a deficient number, since it is larger than the sum of its proper divisors (2329).

855047 is a wasteful number, since it uses less digits than its factorization.

855047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2328.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 855047 is about 924.6875147854. The cubic root of 855047 is about 94.9139386803.

It can be divided in two parts, 8 and 55047, that added together give a palindrome (55055).

The spelling of 855047 in words is "eight hundred fifty-five thousand, forty-seven".