158005 has 4 divisors (see below), whose sum is σ = 189612.
Its totient is φ = 126400.
The previous prime is 158003. The next prime is 158009. The reversal of 158005 is 500851.
Adding to 158005 its reverse (500851), we get a palindrome (658856).
158005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 106929 + 51076 = 327^2 + 226^2
It is not a de Polignac number, because 158005 - 21 = 158003 is a prime.
It is a Duffinian number.
158005 is a lucky number.
It is a nialpdrome in base 12.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (158003) 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, 15796 + ... + 15805.
It is an arithmetic number, because the mean of its divisors is an integer number (47403).
2158005 is an apocalyptic number.
It is an amenable number.
158005 is a deficient number, since it is larger than the sum of its proper divisors (31607).
158005 is an equidigital number, since it uses as much as digits as its factorization.
158005 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 31606.
The product of its (nonzero) digits is 200, while the sum is 19.
The square root of 158005 is about 397.4984276698.
The cubic root of 158005 is about 54.0617720173.
The spelling of 158005 in words is "one hundred fifty-eight thousand, five".