144145021 has 4 divisors (see below), whose sum is σ = 145881792. Its totient is φ = 142408252.

The previous prime is 144144977. The next prime is 144145061. The reversal of 144145021 is 120541441.

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: 120541441 = 17 ⋅7090673.

It is a cyclic number.

It is not a de Polignac number, because 144145021 - 2⁹ = 144144509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 144144983 and 144145001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144145061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 868261 + ... + 868426.

It is an arithmetic number, because the mean of its divisors is an integer number (36470448).

Almost surely, 2^144145021 is an apocalyptic number.

It is an amenable number.

144145021 is a deficient number, since it is larger than the sum of its proper divisors (1736771).

144145021 is an equidigital number, since it uses as much as digits as its factorization.

144145021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736770.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 144145021 is about 12006.0410210860. The cubic root of 144145021 is about 524.3241746859.

Adding to 144145021 its reverse (120541441), we get a palindrome (264686462).

The spelling of 144145021 in words is "one hundred forty-four million, one hundred forty-five thousand, twenty-one".