144243121 has 4 divisors (see below), whose sum is σ = 157356144. Its totient is φ = 131130100.

The previous prime is 144243091. The next prime is 144243133. The reversal of 144243121 is 121342441.

It is a happy number.

144243121 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 144243121 - 2⁵ = 144243089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 144243092 and 144243101.

It is not an unprimeable number, because it can be changed into a prime (144243821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6556495 + ... + 6556516.

It is an arithmetic number, because the mean of its divisors is an integer number (39339036).

Almost surely, 2^144243121 is an apocalyptic number.

144243121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

144243121 is a deficient number, since it is larger than the sum of its proper divisors (13113023).

144243121 is a wasteful number, since it uses less digits than its factorization.

144243121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13113022.

The product of its digits is 768, while the sum is 22.

The square root of 144243121 is about 12010.1257695330. The cubic root of 144243121 is about 524.4430932052.

Adding to 144243121 its reverse (121342441), we get a palindrome (265585562).

The spelling of 144243121 in words is "one hundred forty-four million, two hundred forty-three thousand, one hundred twenty-one".