9121161 has 16 divisors (see below), whose sum is σ = 14348288. Its totient is φ = 5043600.

The previous prime is 9121153. The next prime is 9121171. The reversal of 9121161 is 1611219.

It is not a de Polignac number, because 9121161 - 2³ = 9121153 is a prime.

It is a Smith number, since the sum of its digits (21) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

9121161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9121171) 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 15 ways as a sum of consecutive naturals, for example, 6355 + ... + 7656.

It is an arithmetic number, because the mean of its divisors is an integer number (896768).

Almost surely, 2^9121161 is an apocalyptic number.

It is an amenable number.

9121161 is a deficient number, since it is larger than the sum of its proper divisors (5227127).

9121161 is a wasteful number, since it uses less digits than its factorization.

9121161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14052.

The product of its digits is 108, while the sum is 21.

The square root of 9121161 is about 3020.1259907494. The cubic root of 9121161 is about 208.9376507163.

The spelling of 9121161 in words is "nine million, one hundred twenty-one thousand, one hundred sixty-one".