12115215 has 24 divisors (see below), whose sum is σ = 24000288. Its totient is φ = 5538240.

The previous prime is 12115211. The next prime is 12115223. The reversal of 12115215 is 51251121.

It is not a de Polignac number, because 12115215 - 2² = 12115211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12115211) 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, 18916 + ... + 19545.

It is an arithmetic number, because the mean of its divisors is an integer number (1000012).

Almost surely, 2^12115215 is an apocalyptic number.

12115215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12115215 is a deficient number, since it is larger than the sum of its proper divisors (11885073).

12115215 is a wasteful number, since it uses less digits than its factorization.

12115215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38479 (or 38476 counting only the distinct ones).

The product of its digits is 100, while the sum is 18.

The square root of 12115215 is about 3480.6917415939. The cubic root of 12115215 is about 229.6732284621.

Adding to 12115215 its reverse (51251121), we get a palindrome (63366336).

The spelling of 12115215 in words is "twelve million, one hundred fifteen thousand, two hundred fifteen".