4788221 has 2 divisors, whose sum is σ = 4788222. Its totient is φ = 4788220.

The previous prime is 4788197. The next prime is 4788233. The reversal of 4788221 is 1228874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4468996 + 319225 = 2114^2 + 565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4788221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4788241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2394110 + 2394111.

It is an arithmetic number, because the mean of its divisors is an integer number (2394111).

Almost surely, 2^4788221 is an apocalyptic number.

It is an amenable number.

4788221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4788221 is an equidigital number, since it uses as much as digits as its factorization.

4788221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7168, while the sum is 32.

The square root of 4788221 is about 2188.2004021570. The cubic root of 4788221 is about 168.5484367967.

The spelling of 4788221 in words is "four million, seven hundred eighty-eight thousand, two hundred twenty-one".