144421321 has 16 divisors (see below), whose sum is σ = 161190720. Its totient is φ = 128286720.

The previous prime is 144421297. The next prime is 144421327. The reversal of 144421321 is 123124441.

It is a happy number.

144421321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 144421321 - 2¹⁵ = 144388553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 144421292 and 144421301.

It is not an unprimeable number, because it can be changed into a prime (144421327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124681 + ... + 125833.

It is an arithmetic number, because the mean of its divisors is an integer number (10074420).

Almost surely, 2^144421321 is an apocalyptic number.

144421321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

144421321 is a deficient number, since it is larger than the sum of its proper divisors (16769399).

144421321 is a wasteful number, since it uses less digits than its factorization.

144421321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416.

The product of its digits is 768, while the sum is 22.

The square root of 144421321 is about 12017.5422196055. The cubic root of 144421321 is about 524.6589724777.

Adding to 144421321 its reverse (123124441), we get a palindrome (267545762).

The spelling of 144421321 in words is "one hundred forty-four million, four hundred twenty-one thousand, three hundred twenty-one".