4809221 has 4 divisors (see below), whose sum is σ = 4816332. Its totient is φ = 4802112.

The previous prime is 4809209. The next prime is 4809251. The reversal of 4809221 is 1229084.

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 2592100 + 2217121 = 1610^2 + 1489^2 .

It is a cyclic number.

It is not a de Polignac number, because 4809221 - 2²² = 614917 is a prime.

It is a super-3 number, since 3×4809221³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4809251) 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, 2420 + ... + 3933.

It is an arithmetic number, because the mean of its divisors is an integer number (1204083).

Almost surely, 2^4809221 is an apocalyptic number.

It is an amenable number.

4809221 is a deficient number, since it is larger than the sum of its proper divisors (7111).

4809221 is an equidigital number, since it uses as much as digits as its factorization.

4809221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7110.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 4809221 is about 2192.9936160418. The cubic root of 4809221 is about 168.7944819180.

The spelling of 4809221 in words is "four million, eight hundred nine thousand, two hundred twenty-one".