9165921 has 8 divisors (see below), whose sum is σ = 12421824. Its totient is φ = 6010320.

The previous prime is 9165917. The next prime is 9165929. The reversal of 9165921 is 1295619.

9165921 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9165921 - 2² = 9165917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9165929) 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, 24861 + ... + 25226.

It is an arithmetic number, because the mean of its divisors is an integer number (1552728).

Almost surely, 2^9165921 is an apocalyptic number.

It is an amenable number.

9165921 is a deficient number, since it is larger than the sum of its proper divisors (3255903).

9165921 is a wasteful number, since it uses less digits than its factorization.

9165921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50151.

The product of its digits is 4860, while the sum is 33.

The square root of 9165921 is about 3027.5272087960. The cubic root of 9165921 is about 209.2788643381.

The spelling of 9165921 in words is "nine million, one hundred sixty-five thousand, nine hundred twenty-one".