4556621 has 2 divisors, whose sum is σ = 4556622. Its totient is φ = 4556620.

The previous prime is 4556579. The next prime is 4556623. The reversal of 4556621 is 1266554.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3279721 + 1276900 = 1811^2 + 1130^2 .

It is a cyclic number.

It is not a de Polignac number, because 4556621 - 2⁶ = 4556557 is a prime.

It is a Sophie Germain prime.

Together with 4556623, it forms a pair of twin primes.

It is a Chen 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 (4556623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2278310 + 2278311.

It is an arithmetic number, because the mean of its divisors is an integer number (2278311).

Almost surely, 2^4556621 is an apocalyptic number.

It is an amenable number.

4556621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4556621 is an equidigital number, since it uses as much as digits as its factorization.

4556621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 29.

The square root of 4556621 is about 2134.6243229196. The cubic root of 4556621 is about 165.7859169897.

The spelling of 4556621 in words is "four million, five hundred fifty-six thousand, six hundred twenty-one".