9912161 has 6 divisors (see below), whose sum is σ = 11530530. Its totient is φ = 8496096.

The previous prime is 9912151. The next prime is 9912169. The reversal of 9912161 is 1612199.

It can be written as a sum of positive squares in only one way, i.e., 6599761 + 3312400 = 2569^2 + 1820^2 .

It is a de Polignac number, because none of the positive numbers 2^k-9912161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9912169) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 101096 + ... + 101193.

It is an arithmetic number, because the mean of its divisors is an integer number (1921755).

Almost surely, 2^9912161 is an apocalyptic number.

It is an amenable number.

9912161 is a deficient number, since it is larger than the sum of its proper divisors (1618369).

9912161 is a wasteful number, since it uses less digits than its factorization.

9912161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202303 (or 202296 counting only the distinct ones).

The product of its digits is 972, while the sum is 29.

The square root of 9912161 is about 3148.3584611667. The cubic root of 9912161 is about 214.8108016466.

The spelling of 9912161 in words is "nine million, nine hundred twelve thousand, one hundred sixty-one".