9065721 has 16 divisors (see below), whose sum is σ = 13860224. Its totient is φ = 5163264.

The previous prime is 9065687. The next prime is 9065723. The reversal of 9065721 is 1275609.

9065721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9065721 - 2¹⁸ = 8803577 is a prime.

It is a super-3 number, since 3×9065721³ (a number of 22 digits) contains 333 as substring.

9065721 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9065723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8595 + ... + 9591.

It is an arithmetic number, because the mean of its divisors is an integer number (866264).

Almost surely, 2^9065721 is an apocalyptic number.

It is an amenable number.

9065721 is a deficient number, since it is larger than the sum of its proper divisors (4794503).

9065721 is a wasteful number, since it uses less digits than its factorization.

9065721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 9065721 is about 3010.9335761521. The cubic root of 9065721 is about 208.5134703671.

The spelling of 9065721 in words is "nine million, sixty-five thousand, seven hundred twenty-one".