12128115 has 16 divisors (see below), whose sum is σ = 19819008. Its totient is φ = 6330336.

The previous prime is 12128113. The next prime is 12128117. The reversal of 12128115 is 51182121.

It is an interprime number because it is at equal distance from previous prime (12128113) and next prime (12128117).

It is not a de Polignac number, because 12128115 - 2¹ = 12128113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12128091 and 12128100.

It is not an unprimeable number, because it can be changed into a prime (12128113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7897 + ... + 9306.

It is an arithmetic number, because the mean of its divisors is an integer number (1238688).

Almost surely, 2^12128115 is an apocalyptic number.

12128115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12128115 is a deficient number, since it is larger than the sum of its proper divisors (7690893).

12128115 is a wasteful number, since it uses less digits than its factorization.

12128115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17258.

The product of its digits is 160, while the sum is 21.

The square root of 12128115 is about 3482.5443285047. The cubic root of 12128115 is about 229.7547164561.

The spelling of 12128115 in words is "twelve million, one hundred twenty-eight thousand, one hundred fifteen".