855745 has 8 divisors (see below), whose sum is σ = 1120320. Its totient is φ = 622320.

The previous prime is 855739. The next prime is 855781. The reversal of 855745 is 547558.

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

It is not a de Polignac number, because 855745 - 2³ = 855737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 855745.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7725 + ... + 7834.

It is an arithmetic number, because the mean of its divisors is an integer number (140040).

2⁸⁵⁵⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

855745 is a deficient number, since it is larger than the sum of its proper divisors (264575).

855745 is a wasteful number, since it uses less digits than its factorization.

855745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15575.

The product of its digits is 28000, while the sum is 34.

The square root of 855745 is about 925.0648625907. The cubic root of 855745 is about 94.9397586685.

It can be divided in two parts, 855 and 745, that added together give a square (1600 = 40²).

The spelling of 855745 in words is "eight hundred fifty-five thousand, seven hundred forty-five".