4459921 has 2 divisors, whose sum is σ = 4459922. Its totient is φ = 4459920.

The previous prime is 4459901. The next prime is 4459951. The reversal of 4459921 is 1299544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4456321 + 3600 = 2111^2 + 60^2 .

It is a cyclic number.

It is not a de Polignac number, because 4459921 - 2⁹ = 4459409 is a prime.

It is not a weakly prime, because it can be changed into another prime (4459901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2229960 + 2229961.

It is an arithmetic number, because the mean of its divisors is an integer number (2229961).

Almost surely, 2^4459921 is an apocalyptic number.

It is an amenable number.

4459921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4459921 is an equidigital number, since it uses as much as digits as its factorization.

4459921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 34.

The square root of 4459921 is about 2111.8525043194. The cubic root of 4459921 is about 164.6047595385.

The spelling of 4459921 in words is "four million, four hundred fifty-nine thousand, nine hundred twenty-one".