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3070721 = 4616661

3070721 has 4 divisors (see below), whose sum is σ = 3077844. Its totient is φ = 3063600.

The previous prime is 3070709. The next prime is 3070783. The reversal of 3070721 is 1270703.

3070721 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.

It can be written as a sum of positive squares in 2 ways, for example, as 2070721 + 1000000 = 1439^2 + 1000^2 .

It is a cyclic number.

It is not a de Polignac number, because 3070721 - 26 = 3070657 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 = 3070693 and 3070702.

It is not an unprimeable number, because it can be changed into a prime (3070021) 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, 2870 + ... + 3791.

It is an arithmetic number, because the mean of its divisors is an integer number (769461).

Almost surely, 23070721 is an apocalyptic number.

It is an amenable number.

3070721 is a deficient number, since it is larger than the sum of its proper divisors (7123).

3070721 is an equidigital number, since it uses as much as digits as its factorization.

3070721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7122.

The product of its (nonzero) digits is 294, while the sum is 20.

The square root of 3070721 is about 1752.3472829322. The cubic root of 3070721 is about 145.3494701709.

The spelling of 3070721 in words is "three million, seventy thousand, seven hundred twenty-one".

Divisors: 1 461 6661 3070721