804129 has 4 divisors (see below), whose sum is σ = 1072176. Its totient is φ = 536084.

The previous prime is 804127. The next prime is 804157. The reversal of 804129 is 921408.

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 a cyclic number.

It is not a de Polignac number, because 804129 - 2¹ = 804127 is a prime.

It is a D-number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 804099 and 804108.

It is not an unprimeable number, because it can be changed into a prime (804127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134019 + ... + 134024.

It is an arithmetic number, because the mean of its divisors is an integer number (268044).

2⁸⁰⁴¹²⁹ is an apocalyptic number.

It is an amenable number.

804129 is a deficient number, since it is larger than the sum of its proper divisors (268047).

804129 is a wasteful number, since it uses less digits than its factorization.

804129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268046.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 804129 is about 896.7324015558. The cubic root of 804129 is about 92.9912120266.

The spelling of 804129 in words is "eight hundred four thousand, one hundred twenty-nine".