9525721 has 2 divisors, whose sum is σ = 9525722. Its totient is φ = 9525720.

The previous prime is 9525709. The next prime is 9525751. The reversal of 9525721 is 1275259.

9525721 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., 5569600 + 3956121 = 2360^2 + 1989^2 .

It is a cyclic number.

It is not a de Polignac number, because 9525721 - 2¹¹ = 9523673 is a prime.

It is not a weakly prime, because it can be changed into another prime (9525751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4762860 + 4762861.

It is an arithmetic number, because the mean of its divisors is an integer number (4762861).

Almost surely, 2^9525721 is an apocalyptic number.

It is an amenable number.

9525721 is a deficient number, since it is larger than the sum of its proper divisors (1).

9525721 is an equidigital number, since it uses as much as digits as its factorization.

9525721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6300, while the sum is 31.

The square root of 9525721 is about 3086.3766782426. The cubic root of 9525721 is about 211.9821466513.

The spelling of 9525721 in words is "nine million, five hundred twenty-five thousand, seven hundred twenty-one".