3036721 has 4 divisors (see below), whose sum is σ = 3073392. Its totient is φ = 3000052.

The previous prime is 3036661. The next prime is 3036731. The reversal of 3036721 is 1276303.

3036721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3036721 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3036692 and 3036701.

It is not an unprimeable number, because it can be changed into a prime (3036731) 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 in 3 ways as a sum of consecutive naturals, for example, 18211 + ... + 18376.

It is an arithmetic number, because the mean of its divisors is an integer number (768348).

Almost surely, 2^3036721 is an apocalyptic number.

It is an amenable number.

3036721 is a deficient number, since it is larger than the sum of its proper divisors (36671).

3036721 is an equidigital number, since it uses as much as digits as its factorization.

3036721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36670.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 3036721 is about 1742.6190059792. The cubic root of 3036721 is about 144.8110261182.

The spelling of 3036721 in words is "three million, thirty-six thousand, seven hundred twenty-one".