44021 has 2 divisors, whose sum is σ = 44022. Its totient is φ = 44020.

The previous prime is 44017. The next prime is 44027. The reversal of 44021 is 12044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36100 + 7921 = 190^2 + 89^2 .

It is a cyclic number.

It is not a de Polignac number, because 44021 - 2² = 44017 is a prime.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 43993 and 44011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44027) 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 as a sum of consecutive naturals, namely, 22010 + 22011.

It is an arithmetic number, because the mean of its divisors is an integer number (22011).

2⁴⁴⁰²¹ is an apocalyptic number.

It is an amenable number.

44021 is a deficient number, since it is larger than the sum of its proper divisors (1).

44021 is an equidigital number, since it uses as much as digits as its factorization.

44021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 44021 is about 209.8118204487. The cubic root of 44021 is about 35.3090989232.

Adding to 44021 its reverse (12044), we get a palindrome (56065).

The spelling of 44021 in words is "forty-four thousand, twenty-one", and thus it is an iban number.