9665121 has 4 divisors (see below), whose sum is σ = 12886832. Its totient is φ = 6443412.

The previous prime is 9665113. The next prime is 9665137. The reversal of 9665121 is 1215669.

9665121 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 9665121 - 2³ = 9665113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9665141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1610851 + ... + 1610856.

It is an arithmetic number, because the mean of its divisors is an integer number (3221708).

Almost surely, 2^9665121 is an apocalyptic number.

It is an amenable number.

9665121 is a deficient number, since it is larger than the sum of its proper divisors (3221711).

9665121 is a wasteful number, since it uses less digits than its factorization.

9665121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3221710.

The product of its digits is 3240, while the sum is 30.

The square root of 9665121 is about 3108.8777718013. The cubic root of 9665121 is about 213.0111964843.

The spelling of 9665121 in words is "nine million, six hundred sixty-five thousand, one hundred twenty-one".