4552021 has 2 divisors, whose sum is σ = 4552022. Its totient is φ = 4552020.

The previous prime is 4552019. The next prime is 4552033. The reversal of 4552021 is 1202554.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3204100 + 1347921 = 1790^2 + 1161^2 .

It is a cyclic number.

It is not a de Polignac number, because 4552021 - 2¹ = 4552019 is a prime.

Together with 4552019, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 4552021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4552421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2276010 + 2276011.

It is an arithmetic number, because the mean of its divisors is an integer number (2276011).

Almost surely, 2^4552021 is an apocalyptic number.

It is an amenable number.

4552021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4552021 is an equidigital number, since it uses as much as digits as its factorization.

4552021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 4552021 is about 2133.5465778839. The cubic root of 4552021 is about 165.7301101402.

Adding to 4552021 its reverse (1202554), we get a palindrome (5754575).

The spelling of 4552021 in words is "four million, five hundred fifty-two thousand, twenty-one".