444442121 has 4 divisors (see below), whose sum is σ = 445117200. Its totient is φ = 443767044.

The previous prime is 444442093. The next prime is 444442127. The reversal of 444442121 is 121244444.

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 444442121 - 2⁶ = 444442057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (444442127) 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, 336551 + ... + 337868.

It is an arithmetic number, because the mean of its divisors is an integer number (111279300).

Almost surely, 2^444442121 is an apocalyptic number.

It is an amenable number.

444442121 is a deficient number, since it is larger than the sum of its proper divisors (675079).

444442121 is an equidigital number, since it uses as much as digits as its factorization.

444442121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675078.

The product of its digits is 4096, while the sum is 26.

The square root of 444442121 is about 21081.7959623937. The cubic root of 444442121 is about 763.1414985266.

Adding to 444442121 its reverse (121244444), we get a palindrome (565686565).

The spelling of 444442121 in words is "four hundred forty-four million, four hundred forty-two thousand, one hundred twenty-one".