804139 has 6 divisors (see below), whose sum is σ = 935484. Its totient is φ = 689220.

The previous prime is 804127. The next prime is 804157. The reversal of 804139 is 931408.

It is not a de Polignac number, because 804139 - 2⁵ = 804107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (804119) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8157 + ... + 8254.

It is an arithmetic number, because the mean of its divisors is an integer number (155914).

2⁸⁰⁴¹³⁹ is an apocalyptic number.

804139 is a deficient number, since it is larger than the sum of its proper divisors (131345).

804139 is a wasteful number, since it uses less digits than its factorization.

804139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16425 (or 16418 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 804139 is about 896.7379773379. The cubic root of 804139 is about 92.9915974988.

The spelling of 804139 in words is "eight hundred four thousand, one hundred thirty-nine".