4417921 has 4 divisors (see below), whose sum is σ = 4501332. Its totient is φ = 4334512.

The previous prime is 4417883. The next prime is 4417927. The reversal of 4417921 is 1297144.

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 3013696 + 1404225 = 1736^2 + 1185^2 .

It is a cyclic number.

It is not a de Polignac number, because 4417921 - 2⁷ = 4417793 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 4417921.

It is not an unprimeable number, because it can be changed into a prime (4417927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41626 + ... + 41731.

It is an arithmetic number, because the mean of its divisors is an integer number (1125333).

Almost surely, 2^4417921 is an apocalyptic number.

It is an amenable number.

4417921 is a deficient number, since it is larger than the sum of its proper divisors (83411).

4417921 is an equidigital number, since it uses as much as digits as its factorization.

4417921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83410.

The product of its digits is 2016, while the sum is 28.

The square root of 4417921 is about 2101.8851062796. The cubic root of 4417921 is about 164.0864233171.

It can be divided in two parts, 441 and 7921, that multiplied together give a square (3493161 = 1869²).

The spelling of 4417921 in words is "four million, four hundred seventeen thousand, nine hundred twenty-one".