4821091 has 4 divisors (see below), whose sum is σ = 5259384. Its totient is φ = 4382800.

The previous prime is 4821083. The next prime is 4821097. The reversal of 4821091 is 1901284.

It is a happy number.

4821091 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4821091 - 2³ = 4821083 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (4821097) 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, 219130 + ... + 219151.

It is an arithmetic number, because the mean of its divisors is an integer number (1314846).

Almost surely, 2^4821091 is an apocalyptic number.

4821091 is a deficient number, since it is larger than the sum of its proper divisors (438293).

4821091 is a wasteful number, since it uses less digits than its factorization.

4821091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438292.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 4821091 is about 2195.6982943929. The cubic root of 4821091 is about 168.9332392727.

The spelling of 4821091 in words is "four million, eight hundred twenty-one thousand, ninety-one".