144209 has 4 divisors (see below), whose sum is σ = 155316. Its totient is φ = 133104.

The previous prime is 144203. The next prime is 144223. The reversal of 144209 is 902441.

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 70225 + 73984 = 265^2 + 272^2 .

It is a cyclic number.

It is not a de Polignac number, because 144209 - 2⁸ = 143953 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 144209.

It is not an unprimeable number, because it can be changed into a prime (144203) 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, 5534 + ... + 5559.

It is an arithmetic number, because the mean of its divisors is an integer number (38829).

2¹⁴⁴²⁰⁹ is an apocalyptic number.

It is an amenable number.

144209 is a deficient number, since it is larger than the sum of its proper divisors (11107).

144209 is a wasteful number, since it uses less digits than its factorization.

144209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11106.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 144209 is about 379.7486010507. The cubic root of 144209 is about 52.4401737255.

It can be divided in two parts, 144 and 209, that added together give a palindrome (353).

The spelling of 144209 in words is "one hundred forty-four thousand, two hundred nine".