811125 has 48 divisors (see below), whose sum is σ = 1687296. Its totient is φ = 367200.

The previous prime is 811123. The next prime is 811127. The reversal of 811125 is 521118.

It is an interprime number because it is at equal distance from previous prime (811123) and next prime (811127).

It is not a de Polignac number, because 811125 - 2¹ = 811123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 811098 and 811107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811123) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7824 + ... + 7926.

It is an arithmetic number, because the mean of its divisors is an integer number (35152).

2⁸¹¹¹²⁵ is an apocalyptic number.

It is an amenable number.

811125 is an abundant number, since it is smaller than the sum of its proper divisors (876171).

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

811125 is a wasteful number, since it uses less digits than its factorization.

811125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131 (or 118 counting only the distinct ones).

The product of its digits is 80, while the sum is 18.

The square root of 811125 is about 900.6247831367. The cubic root of 811125 is about 93.2601112214.

It can be divided in two parts, 81 and 1125, that multiplied together give a cube (91125 = 45³).

The spelling of 811125 in words is "eight hundred eleven thousand, one hundred twenty-five".