831129 has 16 divisors (see below), whose sum is σ = 1210944. Its totient is φ = 504000.

The previous prime is 831109. The next prime is 831139. The reversal of 831129 is 921138.

It is not a de Polignac number, because 831129 - 2⁸ = 830873 is a prime.

831129 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 831099 and 831108.

It is not an unprimeable number, because it can be changed into a prime (831109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3834 + ... + 4044.

It is an arithmetic number, because the mean of its divisors is an integer number (75684).

2⁸³¹¹²⁹ is an apocalyptic number.

It is an amenable number.

831129 is a deficient number, since it is larger than the sum of its proper divisors (379815).

831129 is a wasteful number, since it uses less digits than its factorization.

831129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328.

The product of its digits is 432, while the sum is 24.

The square root of 831129 is about 911.6627665974. The cubic root of 831129 is about 94.0205553358.

Subtracting 831129 from its reverse (921138), we obtain a palindrome (90009).

The spelling of 831129 in words is "eight hundred thirty-one thousand, one hundred twenty-nine".