144021 has 8 divisors (see below), whose sum is σ = 195424. Its totient is φ = 94320.

The previous prime is 144013. The next prime is 144031. The reversal of 144021 is 120441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 144021 - 2³ = 144013 is a prime.

It is the 380-th Hogben number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 143988 and 144006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144031) by changing a digit.

It is a nontrivial repunit in base 379.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211 + ... + 576.

It is an arithmetic number, because the mean of its divisors is an integer number (24428).

2¹⁴⁴⁰²¹ is an apocalyptic number.

It is an amenable number.

144021 is a deficient number, since it is larger than the sum of its proper divisors (51403).

144021 is an equidigital number, since it uses as much as digits as its factorization.

144021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 144021 is about 379.5009881410. The cubic root of 144021 is about 52.4173757034.

Adding to 144021 its reverse (120441), we get a palindrome (264462).

The spelling of 144021 in words is "one hundred forty-four thousand, twenty-one", and thus it is an iban number.