44045021 has 4 divisors (see below), whose sum is σ = 46363200. Its totient is φ = 41726844.

The previous prime is 44044999. The next prime is 44045041. The reversal of 44045021 is 12054044.

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 a de Polignac number, because none of the positive numbers 2^k-44045021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 44044984 and 44045002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44045041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1159061 + ... + 1159098.

It is an arithmetic number, because the mean of its divisors is an integer number (11590800).

Almost surely, 2^44045021 is an apocalyptic number.

It is an amenable number.

44045021 is a deficient number, since it is larger than the sum of its proper divisors (2318179).

44045021 is a wasteful number, since it uses less digits than its factorization.

44045021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318178.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 44045021 is about 6636.6422986326. The cubic root of 44045021 is about 353.1552014371.

Adding to 44045021 its reverse (12054044), we get a palindrome (56099065).

The spelling of 44045021 in words is "forty-four million, forty-five thousand, twenty-one".