144421 has 4 divisors (see below), whose sum is σ = 145600. Its totient is φ = 143244.

The previous prime is 144413. The next prime is 144427. The reversal of 144421 is 124441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124441 = 107 ⋅1163.

It is a cyclic number.

It is not a de Polignac number, because 144421 - 2³ = 144413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 144395 and 144404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381 + ... + 658.

It is an arithmetic number, because the mean of its divisors is an integer number (36400).

2¹⁴⁴⁴²¹ is an apocalyptic number.

It is an amenable number.

144421 is a deficient number, since it is larger than the sum of its proper divisors (1179).

144421 is a wasteful number, since it uses less digits than its factorization.

144421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178.

The product of its digits is 128, while the sum is 16.

The square root of 144421 is about 380.0276305744. The cubic root of 144421 is about 52.4658583764.

Adding to 144421 its reverse (124441), we get a palindrome (268862).

It can be divided in two parts, 144 and 421, that added together give a palindrome (565).

The spelling of 144421 in words is "one hundred forty-four thousand, four hundred twenty-one", and thus it is an iban number.