9657121 has 4 divisors (see below), whose sum is σ = 9665200. Its totient is φ = 9649044.

The previous prime is 9657113. The next prime is 9657143. The reversal of 9657121 is 1217569.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1217569 = 53 ⋅22973.

It is a cyclic number.

It is not a de Polignac number, because 9657121 - 2³ = 9657113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9657101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1851 + ... + 4768.

It is an arithmetic number, because the mean of its divisors is an integer number (2416300).

Almost surely, 2^9657121 is an apocalyptic number.

It is an amenable number.

9657121 is a deficient number, since it is larger than the sum of its proper divisors (8079).

9657121 is a wasteful number, since it uses less digits than its factorization.

9657121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8078.

The product of its digits is 3780, while the sum is 31.

The square root of 9657121 is about 3107.5908675371. The cubic root of 9657121 is about 212.9524091549.

The spelling of 9657121 in words is "nine million, six hundred fifty-seven thousand, one hundred twenty-one".