805539 has 16 divisors (see below), whose sum is σ = 1244160. Its totient is φ = 454080.

The previous prime is 805537. The next prime is 805559. The reversal of 805539 is 935508.

It is not a de Polignac number, because 805539 - 2¹ = 805537 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 805539.

It is not an unprimeable number, because it can be changed into a prime (805531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1654 + ... + 2084.

It is an arithmetic number, because the mean of its divisors is an integer number (77760).

2⁸⁰⁵⁵³⁹ is an apocalyptic number.

805539 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

805539 is a deficient number, since it is larger than the sum of its proper divisors (438621).

805539 is a wasteful number, since it uses less digits than its factorization.

805539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 805539 is about 897.5182449399. The cubic root of 805539 is about 93.0455321035.

The spelling of 805539 in words is "eight hundred five thousand, five hundred thirty-nine".