4096721 has 2 divisors, whose sum is σ = 4096722. Its totient is φ = 4096720.

The previous prime is 4096717. The next prime is 4096727. The reversal of 4096721 is 1276904.

4096721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4000000 + 96721 = 2000^2 + 311^2 .

It is a cyclic number.

It is not a de Polignac number, because 4096721 - 2² = 4096717 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4096727) 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, 2048360 + 2048361.

It is an arithmetic number, because the mean of its divisors is an integer number (2048361).

Almost surely, 2^4096721 is an apocalyptic number.

It is an amenable number.

4096721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4096721 is an equidigital number, since it uses as much as digits as its factorization.

4096721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 4096721 is about 2024.0358198411. The cubic root of 4096721 is about 160.0093874700.

The spelling of 4096721 in words is "four million, ninety-six thousand, seven hundred twenty-one".