144442509 has 8 divisors (see below), whose sum is σ = 193307040. Its totient is φ = 95936496.

The previous prime is 144442499. The next prime is 144442511. The reversal of 144442509 is 905244441.

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

It is not a de Polignac number, because 144442509 - 2¹³ = 144434317 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 144442509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144441509) 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, 88687 + ... + 90300.

It is an arithmetic number, because the mean of its divisors is an integer number (24163380).

Almost surely, 2^144442509 is an apocalyptic number.

It is an amenable number.

144442509 is a deficient number, since it is larger than the sum of its proper divisors (48864531).

144442509 is a wasteful number, since it uses less digits than its factorization.

144442509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179259.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 144442509 is about 12018.4237319209. The cubic root of 144442509 is about 524.6846287327.

The spelling of 144442509 in words is "one hundred forty-four million, four hundred forty-two thousand, five hundred nine".