12161097 has 20 divisors (see below), whose sum is σ = 19565700. Its totient is φ = 7483104.

The previous prime is 12161053. The next prime is 12161099. The reversal of 12161097 is 79016121.

It can be written as a sum of positive squares in 2 ways, for example, as 7338681 + 4822416 = 2709^2 + 2196^2 .

It is not a de Polignac number, because 12161097 - 2¹⁰ = 12160073 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 12161097.

It is not an unprimeable number, because it can be changed into a prime (12161099) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4722 + ... + 6827.

It is an arithmetic number, because the mean of its divisors is an integer number (978285).

Almost surely, 2^12161097 is an apocalyptic number.

It is an amenable number.

12161097 is a deficient number, since it is larger than the sum of its proper divisors (7404603).

12161097 is a wasteful number, since it uses less digits than its factorization.

12161097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11574 (or 11565 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The square root of 12161097 is about 3487.2764444477. The cubic root of 12161097 is about 229.9627980158.

The spelling of 12161097 in words is "twelve million, one hundred sixty-one thousand, ninety-seven".