144309 has 8 divisors (see below), whose sum is σ = 209952. Its totient is φ = 87440.

The previous prime is 144307. The next prime is 144311. The reversal of 144309 is 903441.

It is an interprime number because it is at equal distance from previous prime (144307) and next prime (144311).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 144309 - 2¹ = 144307 is a prime.

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 144309.

It is not an unprimeable number, because it can be changed into a prime (144307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2154 + ... + 2219.

It is an arithmetic number, because the mean of its divisors is an integer number (26244).

2¹⁴⁴³⁰⁹ is an apocalyptic number.

It is an amenable number.

144309 is a deficient number, since it is larger than the sum of its proper divisors (65643).

144309 is a wasteful number, since it uses less digits than its factorization.

144309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4387.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 144309 is about 379.8802442876. The cubic root of 144309 is about 52.4522922611.

The spelling of 144309 in words is "one hundred forty-four thousand, three hundred nine".