856481 has 4 divisors (see below), whose sum is σ = 874752. Its totient is φ = 838212.

The previous prime is 856469. The next prime is 856483. The reversal of 856481 is 184658.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 856481 - 2⁶ = 856417 is a prime.

It is a super-2 number, since 2×856481² = 1467119406722, which contains 22 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 856481.

It is not an unprimeable number, because it can be changed into a prime (856483) 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, 9065 + ... + 9158.

It is an arithmetic number, because the mean of its divisors is an integer number (218688).

2⁸⁵⁶⁴⁸¹ is an apocalyptic number.

It is an amenable number.

856481 is a deficient number, since it is larger than the sum of its proper divisors (18271).

856481 is a wasteful number, since it uses less digits than its factorization.

856481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18270.

The product of its digits is 7680, while the sum is 32.

The square root of 856481 is about 925.4625870342. The cubic root of 856481 is about 94.9669691261.

The spelling of 856481 in words is "eight hundred fifty-six thousand, four hundred eighty-one".