4516921 has 2 divisors, whose sum is σ = 4516922. Its totient is φ = 4516920.

The previous prime is 4516913. The next prime is 4516931. The reversal of 4516921 is 1296154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4515625 + 1296 = 2125^2 + 36^2 .

It is a cyclic number.

It is not a de Polignac number, because 4516921 - 2³ = 4516913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4516921.

It is not a weakly prime, because it can be changed into another prime (4516931) 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, 2258460 + 2258461.

It is an arithmetic number, because the mean of its divisors is an integer number (2258461).

Almost surely, 2^4516921 is an apocalyptic number.

It is an amenable number.

4516921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4516921 is an equidigital number, since it uses as much as digits as its factorization.

4516921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 28.

The square root of 4516921 is about 2125.3049192998. The cubic root of 4516921 is about 165.3030366175.

The spelling of 4516921 in words is "four million, five hundred sixteen thousand, nine hundred twenty-one".