12115018 has 4 divisors (see below), whose sum is σ = 18172530. Its totient is φ = 6057508.

The previous prime is 12115013. The next prime is 12115031. The reversal of 12115018 is 81051121.

It is a happy number.

12115018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 9690769 + 2424249 = 3113^2 + 1557^2 .

It is a super-2 number, since 2×12115018² = 293547322280648, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12114986 and 12115004.

It is not an unprimeable number, because it can be changed into a prime (12115013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3028753 + ... + 3028756.

Almost surely, 2^12115018 is an apocalyptic number.

12115018 is a deficient number, since it is larger than the sum of its proper divisors (6057512).

12115018 is an equidigital number, since it uses as much as digits as its factorization.

12115018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6057511.

The product of its (nonzero) digits is 80, while the sum is 19.

The square root of 12115018 is about 3480.6634425063. The cubic root of 12115018 is about 229.6719835848.

Adding to 12115018 its reverse (81051121), we get a palindrome (93166139).

The spelling of 12115018 in words is "twelve million, one hundred fifteen thousand, eighteen".