9475721 has 8 divisors (see below), whose sum is σ = 9859080. Its totient is φ = 9096192.

The previous prime is 9475693. The next prime is 9475751. The reversal of 9475721 is 1275749.

It can be written as a sum of positive squares in 4 ways, for example, as 409600 + 9066121 = 640^2 + 3011^2 .

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 9475721 - 2⁶ = 9475657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9475751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4751 + ... + 6443.

It is an arithmetic number, because the mean of its divisors is an integer number (1232385).

Almost surely, 2^9475721 is an apocalyptic number.

It is an amenable number.

9475721 is a deficient number, since it is larger than the sum of its proper divisors (383359).

9475721 is a wasteful number, since it uses less digits than its factorization.

9475721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915.

The product of its digits is 17640, while the sum is 35.

The square root of 9475721 is about 3078.2659079423. The cubic root of 9475721 is about 211.6106015012.

The spelling of 9475721 in words is "nine million, four hundred seventy-five thousand, seven hundred twenty-one".