144805 has 4 divisors (see below), whose sum is σ = 173772. Its totient is φ = 115840.

The previous prime is 144791. The next prime is 144817. The reversal of 144805 is 508441.

144805 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, and also an emirpimes, since its reverse is a distinct semiprime: 508441 = 41 ⋅12401.

It can be written as a sum of positive squares in 2 ways, for example, as 101124 + 43681 = 318^2 + 209^2 .

It is not a de Polignac number, because 144805 - 2⁵ = 144773 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

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, 14476 + ... + 14485.

It is an arithmetic number, because the mean of its divisors is an integer number (43443).

2¹⁴⁴⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

144805 is a deficient number, since it is larger than the sum of its proper divisors (28967).

144805 is an equidigital number, since it uses as much as digits as its factorization.

144805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28966.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 144805 is about 380.5325216062. The cubic root of 144805 is about 52.5123175936.

It can be divided in two parts, 144 and 805, that added together give a palindrome (949).

The spelling of 144805 in words is "one hundred forty-four thousand, eight hundred five".