144304021 has 8 divisors (see below), whose sum is σ = 146613888. Its totient is φ = 142002000.

The previous prime is 144304009. The next prime is 144304037. The reversal of 144304021 is 120403441.

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 144304021 - 2¹³ = 144295829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 144304021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144364021) 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, 43191 + ... + 46411.

It is an arithmetic number, because the mean of its divisors is an integer number (18326736).

Almost surely, 2^144304021 is an apocalyptic number.

It is an amenable number.

144304021 is a deficient number, since it is larger than the sum of its proper divisors (2309867).

144304021 is an equidigital number, since it uses as much as digits as its factorization.

144304021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3923.

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

The square root of 144304021 is about 12012.6608626066. The cubic root of 144304021 is about 524.5168901169.

Adding to 144304021 its reverse (120403441), we get a palindrome (264707462).

The spelling of 144304021 in words is "one hundred forty-four million, three hundred four thousand, twenty-one".