144440121 has 16 divisors (see below), whose sum is σ = 221257728. Its totient is φ = 82102800.

The previous prime is 144440111. The next prime is 144440159. The reversal of 144440121 is 121044441.

It is not a de Polignac number, because 144440121 - 2⁷ = 144439993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (144440111) 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 15 ways as a sum of consecutive naturals, for example, 13995 + ... + 22016.

It is an arithmetic number, because the mean of its divisors is an integer number (13828608).

Almost surely, 2^144440121 is an apocalyptic number.

It is an amenable number.

144440121 is a deficient number, since it is larger than the sum of its proper divisors (76817607).

144440121 is a wasteful number, since it uses less digits than its factorization.

144440121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36212.

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 144440121 is about 12018.3243840396. The cubic root of 144440121 is about 524.6817372622.

Adding to 144440121 its reverse (121044441), we get a palindrome (265484562).

The spelling of 144440121 in words is "one hundred forty-four million, four hundred forty thousand, one hundred twenty-one".