4772221 has 4 divisors (see below), whose sum is σ = 4793472. Its totient is φ = 4750972.

The previous prime is 4772191. The next prime is 4772227. The reversal of 4772221 is 1222774.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4772221 - 2⁹ = 4771709 is a prime.

It is an Ulam number.

It is a Duffinian number.

4772221 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4772227) 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, 10285 + ... + 10738.

It is an arithmetic number, because the mean of its divisors is an integer number (1198368).

Almost surely, 2^4772221 is an apocalyptic number.

It is an amenable number.

4772221 is a deficient number, since it is larger than the sum of its proper divisors (21251).

4772221 is a wasteful number, since it uses less digits than its factorization.

4772221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21250.

The product of its digits is 1568, while the sum is 25.

The square root of 4772221 is about 2184.5413706314. The cubic root of 4772221 is about 168.3604905591.

Adding to 4772221 its reverse (1222774), we get a palindrome (5994995).

The spelling of 4772221 in words is "four million, seven hundred seventy-two thousand, two hundred twenty-one".