7305750721 has 8 divisors (see below), whose sum is σ = 7440943904. Its totient is φ = 7171506720.

The previous prime is 7305750691. The next prime is 7305750733. The reversal of 7305750721 is 1270575037.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7305750721 - 2⁵ = 7305750689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7305750761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221751 + ... + 252556.

It is an arithmetic number, because the mean of its divisors is an integer number (930117988).

Almost surely, 2^7305750721 is an apocalyptic number.

It is an amenable number.

7305750721 is a deficient number, since it is larger than the sum of its proper divisors (135193183).

7305750721 is a wasteful number, since it uses less digits than its factorization.

7305750721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474591.

The product of its (nonzero) digits is 51450, while the sum is 37.

The square root of 7305750721 is about 85473.6843771228. The cubic root of 7305750721 is about 1940.3866732878.

The spelling of 7305750721 in words is "seven billion, three hundred five million, seven hundred fifty thousand, seven hundred twenty-one".