144024421 has 4 divisors (see below), whose sum is σ = 144941932. Its totient is φ = 143106912.

The previous prime is 144024409. The next prime is 144024437. The reversal of 144024421 is 124420441.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 77193796 + 66830625 = 8786^2 + 8175^2 .

It is a cyclic number.

It is not a de Polignac number, because 144024421 - 2⁹ = 144023909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 144024392 and 144024401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144024451) 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, 458520 + ... + 458833.

It is an arithmetic number, because the mean of its divisors is an integer number (36235483).

Almost surely, 2^144024421 is an apocalyptic number.

It is an amenable number.

144024421 is a deficient number, since it is larger than the sum of its proper divisors (917511).

144024421 is an equidigital number, since it uses as much as digits as its factorization.

144024421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917510.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 144024421 is about 12001.0174985290. The cubic root of 144024421 is about 524.1779073177.

Adding to 144024421 its reverse (124420441), we get a palindrome (268444862).

The spelling of 144024421 in words is "one hundred forty-four million, twenty-four thousand, four hundred twenty-one".