812835 has 28 divisors (see below), whose sum is σ = 1468992. Its totient is φ = 431568.

The previous prime is 812807. The next prime is 812849. The reversal of 812835 is 538218.

It is a happy number.

812835 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 812835 - 2¹² = 808739 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 812799 and 812808.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 3534 + ... + 3756.

It is an arithmetic number, because the mean of its divisors is an integer number (52464).

2⁸¹²⁸³⁵ is an apocalyptic number.

812835 is a deficient number, since it is larger than the sum of its proper divisors (656157).

812835 is an equidigital number, since it uses as much as digits as its factorization.

812835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246 (or 231 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 812835 is about 901.5736242815. The cubic root of 812835 is about 93.3256016838.

It can be divided in two parts, 81 and 2835, that added together give a square (2916 = 54²).

The spelling of 812835 in words is "eight hundred twelve thousand, eight hundred thirty-five".