804039 has 4 divisors (see below), whose sum is σ = 1072056. Its totient is φ = 536024.

The previous prime is 804031. The next prime is 804043. The reversal of 804039 is 930408.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 804039 - 2³ = 804031 is a prime.

It is a D-number.

804039 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (804031) 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, 134004 + ... + 134009.

It is an arithmetic number, because the mean of its divisors is an integer number (268014).

2⁸⁰⁴⁰³⁹ is an apocalyptic number.

804039 is a deficient number, since it is larger than the sum of its proper divisors (268017).

804039 is a wasteful number, since it uses less digits than its factorization.

804039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268016.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 804039 is about 896.6822179568. The cubic root of 804039 is about 92.9877426324.

The spelling of 804039 in words is "eight hundred four thousand, thirty-nine".