144430021 has 8 divisors (see below), whose sum is σ = 146160000. Its totient is φ = 142710480.

The previous prime is 144430019. The next prime is 144430031. The reversal of 144430021 is 120034441.

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 144430021 - 2¹ = 144430019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144430031) 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, 27216 + ... + 32086.

It is an arithmetic number, because the mean of its divisors is an integer number (18270000).

Almost surely, 2^144430021 is an apocalyptic number.

It is an amenable number.

144430021 is a deficient number, since it is larger than the sum of its proper divisors (1729979).

144430021 is a wasteful number, since it uses less digits than its factorization.

144430021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5219.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 144430021 is about 12017.9041850066. The cubic root of 144430021 is about 524.6695074906.

Adding to 144430021 its reverse (120034441), we get a palindrome (264464462).

The spelling of 144430021 in words is "one hundred forty-four million, four hundred thirty thousand, twenty-one".