158805 has 12 divisors (see below), whose sum is σ = 275340. Its totient is φ = 84672.

The previous prime is 158803. The next prime is 158843. The reversal of 158805 is 508851.

158805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 33489 + 125316 = 183^2 + 354^2 .

It is not a de Polignac number, because 158805 - 2¹ = 158803 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1720 + ... + 1809.

It is an arithmetic number, because the mean of its divisors is an integer number (22945).

2¹⁵⁸⁸⁰⁵ is an apocalyptic number.

158805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

158805 is a deficient number, since it is larger than the sum of its proper divisors (116535).

158805 is a wasteful number, since it uses less digits than its factorization.

158805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3540 (or 3537 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

The square root of 158805 is about 398.5034504242. The cubic root of 158805 is about 54.1528590710.

The spelling of 158805 in words is "one hundred fifty-eight thousand, eight hundred five".