144442321 has 2 divisors, whose sum is σ = 144442322. Its totient is φ = 144442320.

The previous prime is 144442297. The next prime is 144442349. The reversal of 144442321 is 123244441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96334225 + 48108096 = 9815^2 + 6936^2 .

It is a cyclic number.

It is not a de Polignac number, because 144442321 - 2²⁷ = 10224593 is a prime.

It is not a weakly prime, because it can be changed into another prime (144442391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72221160 + 72221161.

It is an arithmetic number, because the mean of its divisors is an integer number (72221161).

Almost surely, 2^144442321 is an apocalyptic number.

It is an amenable number.

144442321 is a deficient number, since it is larger than the sum of its proper divisors (1).

144442321 is an equidigital number, since it uses as much as digits as its factorization.

144442321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3072, while the sum is 25.

The square root of 144442321 is about 12018.4159105932. The cubic root of 144442321 is about 524.6844010972.

Adding to 144442321 its reverse (123244441), we get a palindrome (267686762).

The spelling of 144442321 in words is "one hundred forty-four million, four hundred forty-two thousand, three hundred twenty-one".