12161071 has 12 divisors (see below), whose sum is σ = 13268232. Its totient is φ = 11140896.

The previous prime is 12161053. The next prime is 12161099. The reversal of 12161071 is 17016121.

12161071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12161071 - 2¹⁹ = 11636783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12161011) 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, 38205 + ... + 38521.

It is an arithmetic number, because the mean of its divisors is an integer number (1105686).

Almost surely, 2^12161071 is an apocalyptic number.

12161071 is a deficient number, since it is larger than the sum of its proper divisors (1107161).

12161071 is a wasteful number, since it uses less digits than its factorization.

12161071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570 (or 557 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 19.

The square root of 12161071 is about 3487.2727166082. The cubic root of 12161071 is about 229.9626341315.

Adding to 12161071 its reverse (17016121), we get a palindrome (29177192).

The spelling of 12161071 in words is "twelve million, one hundred sixty-one thousand, seventy-one".