44772121 has 4 divisors (see below), whose sum is σ = 45616932. Its totient is φ = 43927312.

The previous prime is 44772107. The next prime is 44772127. The reversal of 44772121 is 12127744.

44772121 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.

It can be written as a sum of positive squares in 2 ways, for example, as 41024025 + 3748096 = 6405^2 + 1936^2 .

It is a cyclic number.

It is not a de Polignac number, because 44772121 - 2⁵ = 44772089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 44772121.

It is not an unprimeable number, because it can be changed into a prime (44772127) 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, 422326 + ... + 422431.

It is an arithmetic number, because the mean of its divisors is an integer number (11404233).

Almost surely, 2^44772121 is an apocalyptic number.

It is an amenable number.

44772121 is a deficient number, since it is larger than the sum of its proper divisors (844811).

44772121 is an equidigital number, since it uses as much as digits as its factorization.

44772121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844810.

The product of its digits is 3136, while the sum is 28.

The square root of 44772121 is about 6691.1972770200. The cubic root of 44772121 is about 355.0879131607.

Adding to 44772121 its reverse (12127744), we get a palindrome (56899865).

The spelling of 44772121 in words is "forty-four million, seven hundred seventy-two thousand, one hundred twenty-one".