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144185 = 528837

144185 has 4 divisors (see below), whose sum is σ = 173028. Its totient is φ = 115344.

The previous prime is 144173. The next prime is 144203. The reversal of 144185 is 581441.

144185 = 2682 + 2692.

144185 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: 581441 = 783063.

It can be written as a sum of positive squares in 2 ways, for example, as 71824 + 72361 = 268^2 + 269^2 .

It is a cyclic number.

It is not a de Polignac number, because 144185 - 24 = 144169 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 144185.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 144185.

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, 14414 + ... + 14423.

It is an arithmetic number, because the mean of its divisors is an integer number (43257).

2144185 is an apocalyptic number.

144185 is the 269-th centered square number.

It is an amenable number.

144185 is a deficient number, since it is larger than the sum of its proper divisors (28843).

144185 is an equidigital number, since it uses as much as digits as its factorization.

144185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28842.

The product of its digits is 640, while the sum is 23.

The square root of 144185 is about 379.7169998828. The cubic root of 144185 is about 52.4372644434.

The spelling of 144185 in words is "one hundred forty-four thousand, one hundred eighty-five".

Divisors: 1 5 28837 144185