144444121 has 4 divisors (see below), whose sum is σ = 152940852. Its totient is φ = 135947392.

The previous prime is 144444109. The next prime is 144444149. The reversal of 144444121 is 121444441.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 97713225 + 46730896 = 9885^2 + 6836^2 .

It is a cyclic number.

It is not a de Polignac number, because 144444121 - 2⁷ = 144443993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144442121) 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, 4248340 + ... + 4248373.

It is an arithmetic number, because the mean of its divisors is an integer number (38235213).

Almost surely, 2^144444121 is an apocalyptic number.

It is an amenable number.

144444121 is a deficient number, since it is larger than the sum of its proper divisors (8496731).

144444121 is an equidigital number, since it uses as much as digits as its factorization.

144444121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8496730.

The product of its digits is 2048, while the sum is 25.

The square root of 144444121 is about 12018.4907954368. The cubic root of 144444121 is about 524.6865805785.

Adding to 144444121 its reverse (121444441), we get a palindrome (265888562).

The spelling of 144444121 in words is "one hundred forty-four million, four hundred forty-four thousand, one hundred twenty-one".