4552421 has 2 divisors, whose sum is σ = 4552422. Its totient is φ = 4552420.

The previous prime is 4552417. The next prime is 4552423. The reversal of 4552421 is 1242554.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4456321 + 96100 = 2111^2 + 310^2 .

It is a cyclic number.

It is not a de Polignac number, because 4552421 - 2² = 4552417 is a prime.

It is a super-2 number, since 2×4552421² = 41449073922482, which contains 22 as substring.

Together with 4552423, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4552423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2276210 + 2276211.

It is an arithmetic number, because the mean of its divisors is an integer number (2276211).

Almost surely, 2^4552421 is an apocalyptic number.

It is an amenable number.

4552421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4552421 is an equidigital number, since it uses as much as digits as its factorization.

4552421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1600, while the sum is 23.

The square root of 4552421 is about 2133.6403164545. The cubic root of 4552421 is about 165.7349644018.

Adding to 4552421 its reverse (1242554), we get a palindrome (5794975).

The spelling of 4552421 in words is "four million, five hundred fifty-two thousand, four hundred twenty-one".