150805 has 4 divisors (see below), whose sum is σ = 180972. Its totient is φ = 120640.

The previous prime is 150797. The next prime is 150827. The reversal of 150805 is 508051.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 508051 = 29 ⋅17519.

It can be written as a sum of positive squares in 2 ways, for example, as 88804 + 62001 = 298^2 + 249^2 .

It is not a de Polignac number, because 150805 - 2³ = 150797 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15076 + ... + 15085.

It is an arithmetic number, because the mean of its divisors is an integer number (45243).

2¹⁵⁰⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

150805 is a deficient number, since it is larger than the sum of its proper divisors (30167).

150805 is an equidigital number, since it uses as much as digits as its factorization.

150805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30166.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 150805 is about 388.3361945531. The cubic root of 150805 is about 53.2278078377.

Adding to 150805 its reverse (508051), we get a palindrome (658856).

The spelling of 150805 in words is "one hundred fifty thousand, eight hundred five".