144421135 has 4 divisors (see below), whose sum is σ = 173305368. Its totient is φ = 115536904.

The previous prime is 144421127. The next prime is 144421159. The reversal of 144421135 is 531124441.

144421135 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 531124441 = 23 ⋅23092367.

It is a cyclic number.

It is not a de Polignac number, because 144421135 - 2³ = 144421127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14442109 + ... + 14442118.

It is an arithmetic number, because the mean of its divisors is an integer number (43326342).

Almost surely, 2^144421135 is an apocalyptic number.

144421135 is a deficient number, since it is larger than the sum of its proper divisors (28884233).

144421135 is an equidigital number, since it uses as much as digits as its factorization.

144421135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28884232.

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

The square root of 144421135 is about 12017.5344809158. The cubic root of 144421135 is about 524.6587472418.

Adding to 144421135 its reverse (531124441), we get a palindrome (675545576).

The spelling of 144421135 in words is "one hundred forty-four million, four hundred twenty-one thousand, one hundred thirty-five".