805987 has 16 divisors (see below), whose sum is σ = 1052352. Its totient is φ = 599040.

The previous prime is 805967. The next prime is 805991. The reversal of 805987 is 789508.

805987 is nontrivially palindromic in base 9.

It is not a de Polignac number, because 805987 - 2⁷ = 805859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (805967) 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, 1287 + ... + 1807.

It is an arithmetic number, because the mean of its divisors is an integer number (65772).

2⁸⁰⁵⁹⁸⁷ is an apocalyptic number.

805987 is a deficient number, since it is larger than the sum of its proper divisors (246365).

805987 is a wasteful number, since it uses less digits than its factorization.

805987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 805987 is about 897.7677873482. The cubic root of 805987 is about 93.0627779779.

The spelling of 805987 in words is "eight hundred five thousand, nine hundred eighty-seven".