4581921 has 8 divisors (see below), whose sum is σ = 6186880. Its totient is φ = 3015792.

The previous prime is 4581919. The next prime is 4581931. The reversal of 4581921 is 1291854.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4581921 - 2¹ = 4581919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4581911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9430 + ... + 9903.

It is an arithmetic number, because the mean of its divisors is an integer number (773360).

Almost surely, 2^4581921 is an apocalyptic number.

It is an amenable number.

4581921 is a deficient number, since it is larger than the sum of its proper divisors (1604959).

4581921 is a wasteful number, since it uses less digits than its factorization.

4581921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19415.

The product of its digits is 2880, while the sum is 30.

The square root of 4581921 is about 2140.5422210272. The cubic root of 4581921 is about 166.0921852126.

The spelling of 4581921 in words is "four million, five hundred eighty-one thousand, nine hundred twenty-one".