811455 has 16 divisors (see below), whose sum is σ = 1327104. Its totient is φ = 423200.

The previous prime is 811441. The next prime is 811457. The reversal of 811455 is 554118.

It is not a de Polignac number, because 811455 - 2⁸ = 811199 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 811455.

It is not an unprimeable number, because it can be changed into a prime (811457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130 + ... + 1280.

It is an arithmetic number, because the mean of its divisors is an integer number (82944).

2⁸¹¹⁴⁵⁵ is an apocalyptic number.

811455 is a deficient number, since it is larger than the sum of its proper divisors (515649).

811455 is a wasteful number, since it uses less digits than its factorization.

811455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206.

The product of its digits is 800, while the sum is 24.

The square root of 811455 is about 900.8079706575. The cubic root of 811455 is about 93.2727568942.

It can be divided in two parts, 81 and 1455, that multiplied together give a triangular number (117855 = T₄₈₅).

The spelling of 811455 in words is "eight hundred eleven thousand, four hundred fifty-five".