144421513 has 4 divisors (see below), whose sum is σ = 144445588. Its totient is φ = 144397440.

The previous prime is 144421507. The next prime is 144421517. The reversal of 144421513 is 315124441.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 86174089 + 58247424 = 9283^2 + 7632^2 .

It is a cyclic number.

It is not a de Polignac number, because 144421513 - 2⁵ = 144421481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144421517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4993 + ... + 17713.

It is an arithmetic number, because the mean of its divisors is an integer number (36111397).

Almost surely, 2^144421513 is an apocalyptic number.

It is an amenable number.

144421513 is a deficient number, since it is larger than the sum of its proper divisors (24075).

144421513 is a wasteful number, since it uses less digits than its factorization.

144421513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24074.

The product of its digits is 1920, while the sum is 25.

The square root of 144421513 is about 12017.5502079251. The cubic root of 144421513 is about 524.6592049791.

Adding to 144421513 its reverse (315124441), we get a palindrome (459545954).

The spelling of 144421513 in words is "one hundred forty-four million, four hundred twenty-one thousand, five hundred thirteen".