811854 has 48 divisors (see below), whose sum is σ = 1920672. Its totient is φ = 247104.

The previous prime is 811819. The next prime is 811861. The reversal of 811854 is 458118.

811854 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

811854 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15292 + ... + 15344.

It is an arithmetic number, because the mean of its divisors is an integer number (40014).

2⁸¹¹⁸⁵⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 811854, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (960336).

811854 is an abundant number, since it is smaller than the sum of its proper divisors (1108818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

811854 is a wasteful number, since it uses less digits than its factorization.

811854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 118 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

The square root of 811854 is about 901.0294112847. The cubic root of 811854 is about 93.2880420843.

The spelling of 811854 in words is "eight hundred eleven thousand, eight hundred fifty-four".