12161115 has 24 divisors (see below), whose sum is σ = 21481200. Its totient is φ = 6362304.

The previous prime is 12161113. The next prime is 12161117. The reversal of 12161115 is 51116121.

It is a happy number.

12161115 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12161113) and next prime (12161117).

It is not a de Polignac number, because 12161115 - 2¹ = 12161113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12161113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165 + ... + 4934.

It is an arithmetic number, because the mean of its divisors is an integer number (895050).

Almost surely, 2^12161115 is an apocalyptic number.

12161115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12161115 is a deficient number, since it is larger than the sum of its proper divisors (9320085).

12161115 is a wasteful number, since it uses less digits than its factorization.

12161115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5163 (or 5160 counting only the distinct ones).

The product of its digits is 60, while the sum is 18.

The square root of 12161115 is about 3487.2790252574. The cubic root of 12161115 is about 229.9629114739.

Adding to 12161115 its reverse (51116121), we get a palindrome (63277236).

The spelling of 12161115 in words is "twelve million, one hundred sixty-one thousand, one hundred fifteen".