828129 has 4 divisors (see below), whose sum is σ = 1104176. Its totient is φ = 552084.

The previous prime is 828127. The next prime is 828131. The reversal of 828129 is 921828.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (828127) and next prime (828131).

It is not a de Polignac number, because 828129 - 2¹ = 828127 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 828096 and 828105.

It is not an unprimeable number, because it can be changed into a prime (828127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138019 + ... + 138024.

It is an arithmetic number, because the mean of its divisors is an integer number (276044).

2⁸²⁸¹²⁹ is an apocalyptic number.

It is an amenable number.

828129 is a deficient number, since it is larger than the sum of its proper divisors (276047).

828129 is a wasteful number, since it uses less digits than its factorization.

828129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276046.

The product of its digits is 2304, while the sum is 30.

The square root of 828129 is about 910.0159339264. The cubic root of 828129 is about 93.9072950517.

The spelling of 828129 in words is "eight hundred twenty-eight thousand, one hundred twenty-nine".