4327921 has 6 divisors (see below), whose sum is σ = 4686630. Its totient is φ = 3994848.

The previous prime is 4327913. The next prime is 4327937. The reversal of 4327921 is 1297234.

It can be written as a sum of positive squares in 3 ways, for example, as 583696 + 3744225 = 764^2 + 1935^2 .

It is not a de Polignac number, because 4327921 - 2³ = 4327913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4327921.

It is not an unprimeable number, because it can be changed into a prime (4327621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12636 + ... + 12973.

It is an arithmetic number, because the mean of its divisors is an integer number (781105).

Almost surely, 2^4327921 is an apocalyptic number.

It is an amenable number.

4327921 is a deficient number, since it is larger than the sum of its proper divisors (358709).

4327921 is a wasteful number, since it uses less digits than its factorization.

4327921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25635 (or 25622 counting only the distinct ones).

The product of its digits is 3024, while the sum is 28.

The square root of 4327921 is about 2080.3655928706. The cubic root of 4327921 is about 162.9645374319.

The spelling of 4327921 in words is "four million, three hundred twenty-seven thousand, nine hundred twenty-one".