144909 has 10 divisors (see below), whose sum is σ = 216590. Its totient is φ = 96552.

The previous prime is 144899. The next prime is 144917. The reversal of 144909 is 909441.

It can be written as a sum of positive squares in only one way, i.e., 142884 + 2025 = 378^2 + 45^2 .

It is not a de Polignac number, because 144909 - 2¹² = 140813 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a zygodrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144409) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 814 + ... + 975.

It is an arithmetic number, because the mean of its divisors is an integer number (21659).

2¹⁴⁴⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

144909 is a deficient number, since it is larger than the sum of its proper divisors (71681).

144909 is an equidigital number, since it uses as much as digits as its factorization.

144909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1801 (or 1792 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 144909 is about 380.6691476860. The cubic root of 144909 is about 52.5248861607.

The spelling of 144909 in words is "one hundred forty-four thousand, nine hundred nine".