12116261 has 4 divisors (see below), whose sum is σ = 12127392. Its totient is φ = 12105132.

The previous prime is 12116231. The next prime is 12116297. The reversal of 12116261 is 16261121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12116261 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 (12116201) 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 3 ways as a sum of consecutive naturals, for example, 3731 + ... + 6176.

It is an arithmetic number, because the mean of its divisors is an integer number (3031848).

Almost surely, 2^12116261 is an apocalyptic number.

It is an amenable number.

12116261 is a deficient number, since it is larger than the sum of its proper divisors (11131).

12116261 is an equidigital number, since it uses as much as digits as its factorization.

12116261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11130.

The product of its digits is 144, while the sum is 20.

The square root of 12116261 is about 3480.8419958395. The cubic root of 12116261 is about 229.6798380926.

Adding to 12116261 its reverse (16261121), we get a palindrome (28377382).

The spelling of 12116261 in words is "twelve million, one hundred sixteen thousand, two hundred sixty-one".