855447 has 8 divisors (see below), whose sum is σ = 1165056. Its totient is φ = 558072.

The previous prime is 855431. The next prime is 855461. The reversal of 855447 is 744558.

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

It is not a de Polignac number, because 855447 - 2⁴ = 855431 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855427) 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 7 ways as a sum of consecutive naturals, for example, 2893 + ... + 3174.

It is an arithmetic number, because the mean of its divisors is an integer number (145632).

2⁸⁵⁵⁴⁴⁷ is an apocalyptic number.

855447 is a deficient number, since it is larger than the sum of its proper divisors (309609).

855447 is a wasteful number, since it uses less digits than its factorization.

855447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6117.

The product of its digits is 22400, while the sum is 33.

The square root of 855447 is about 924.9037787792. The cubic root of 855447 is about 94.9287369533.

Subtracting from 855447 its reverse (744558), we obtain a square (110889 = 333²).

It can be divided in two parts, 8 and 55447, that added together give a palindrome (55455).

The spelling of 855447 in words is "eight hundred fifty-five thousand, four hundred forty-seven".