12161271 has 12 divisors (see below), whose sum is σ = 16703736. Its totient is φ = 7864560.

The previous prime is 12161251. The next prime is 12161287. The reversal of 12161271 is 17216121.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-12161271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12161251) 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, 36576 + ... + 36906.

It is an arithmetic number, because the mean of its divisors is an integer number (1391978).

Almost surely, 2^12161271 is an apocalyptic number.

12161271 is a deficient number, since it is larger than the sum of its proper divisors (4542465).

12161271 is an frugal number, since it uses more digits than its factorization.

12161271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702 (or 371 counting only the distinct ones).

The product of its digits is 168, while the sum is 21.

The square root of 12161271 is about 3487.3013921943. The cubic root of 12161271 is about 229.9638947736.

Adding to 12161271 its reverse (17216121), we get a palindrome (29377392).

The spelling of 12161271 in words is "twelve million, one hundred sixty-one thousand, two hundred seventy-one".