44121421 has 4 divisors (see below), whose sum is σ = 44680000. Its totient is φ = 43562844.

The previous prime is 44121403. The next prime is 44121431. The reversal of 44121421 is 12412144.

44121421 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 44121421 - 2⁷ = 44121293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44121431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279171 + ... + 279328.

It is an arithmetic number, because the mean of its divisors is an integer number (11170000).

Almost surely, 2^44121421 is an apocalyptic number.

It is an amenable number.

44121421 is a deficient number, since it is larger than the sum of its proper divisors (558579).

44121421 is an equidigital number, since it uses as much as digits as its factorization.

44121421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558578.

The product of its digits is 256, while the sum is 19.

The square root of 44121421 is about 6642.3957274465. The cubic root of 44121421 is about 353.3592765058.

Adding to 44121421 its reverse (12412144), we get a palindrome (56533565).

The spelling of 44121421 in words is "forty-four million, one hundred twenty-one thousand, four hundred twenty-one".