44921 has 4 divisors (see below), whose sum is σ = 46500. Its totient is φ = 43344.

The previous prime is 44917. The next prime is 44927. The reversal of 44921 is 12944.

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 19321 + 25600 = 139^2 + 160^2 .

It is a cyclic number.

It is not a de Polignac number, because 44921 - 2² = 44917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 44893 and 44902.

It is not an unprimeable number, because it can be changed into a prime (44927) 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, 746 + ... + 803.

It is an arithmetic number, because the mean of its divisors is an integer number (11625).

2⁴⁴⁹²¹ is an apocalyptic number.

It is an amenable number.

44921 is a deficient number, since it is larger than the sum of its proper divisors (1579).

44921 is a wasteful number, since it uses less digits than its factorization.

44921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578.

The product of its digits is 288, while the sum is 20.

The square root of 44921 is about 211.9457477752. The cubic root of 44921 is about 35.5481064401.

The spelling of 44921 in words is "forty-four thousand, nine hundred twenty-one".