4556521 has 2 divisors, whose sum is σ = 4556522. Its totient is φ = 4556520.

The previous prime is 4556501. The next prime is 4556557. The reversal of 4556521 is 1256554.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3534400 + 1022121 = 1880^2 + 1011^2 .

It is a cyclic number.

It is not a de Polignac number, because 4556521 - 2¹³ = 4548329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4556521.

It is not a weakly prime, because it can be changed into another prime (4556501) 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, 2278260 + 2278261.

It is an arithmetic number, because the mean of its divisors is an integer number (2278261).

Almost surely, 2^4556521 is an apocalyptic number.

It is an amenable number.

4556521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4556521 is an equidigital number, since it uses as much as digits as its factorization.

4556521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6000, while the sum is 28.

The square root of 4556521 is about 2134.6008994658. The cubic root of 4556521 is about 165.7847041968.

The spelling of 4556521 in words is "four million, five hundred fifty-six thousand, five hundred twenty-one".