9159921 has 12 divisors (see below), whose sum is σ = 13257972. Its totient is φ = 6094176.

The previous prime is 9159907. The next prime is 9159977. The reversal of 9159921 is 1299519.

9159921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 5239521 + 3920400 = 2289^2 + 1980^2 .

It is not a de Polignac number, because 9159921 - 2¹¹ = 9157873 is a prime.

9159921 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9159901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6535 + ... + 7811.

It is an arithmetic number, because the mean of its divisors is an integer number (1104831).

Almost surely, 2^9159921 is an apocalyptic number.

It is an amenable number.

9159921 is a deficient number, since it is larger than the sum of its proper divisors (4098051).

9159921 is a wasteful number, since it uses less digits than its factorization.

9159921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2080 (or 2077 counting only the distinct ones).

The product of its digits is 7290, while the sum is 36.

The square root of 9159921 is about 3026.5361388888. The cubic root of 9159921 is about 209.2331898128.

The spelling of 9159921 in words is "nine million, one hundred fifty-nine thousand, nine hundred twenty-one".