856455 has 8 divisors (see below), whose sum is σ = 1370352. Its totient is φ = 456768.

The previous prime is 856441. The next prime is 856459. The reversal of 856455 is 554658.

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

It is not a de Polignac number, because 856455 - 2⁶ = 856391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856459) 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, 28534 + ... + 28563.

It is an arithmetic number, because the mean of its divisors is an integer number (171294).

2⁸⁵⁶⁴⁵⁵ is an apocalyptic number.

856455 is a deficient number, since it is larger than the sum of its proper divisors (513897).

856455 is a wasteful number, since it uses less digits than its factorization.

856455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57105.

The product of its digits is 24000, while the sum is 33.

The square root of 856455 is about 925.4485398984. The cubic root of 856455 is about 94.9660081528.

The spelling of 856455 in words is "eight hundred fifty-six thousand, four hundred fifty-five".