12115867 has 2 divisors, whose sum is σ = 12115868. Its totient is φ = 12115866.

The previous prime is 12115861. The next prime is 12115889. The reversal of 12115867 is 76851121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12115867 - 2⁷ = 12115739 is a prime.

It is not a weakly prime, because it can be changed into another prime (12115861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6057933 + 6057934.

It is an arithmetic number, because the mean of its divisors is an integer number (6057934).

Almost surely, 2^12115867 is an apocalyptic number.

12115867 is a deficient number, since it is larger than the sum of its proper divisors (1).

12115867 is an equidigital number, since it uses as much as digits as its factorization.

12115867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 31.

The square root of 12115867 is about 3480.7853998774. The cubic root of 12115867 is about 229.6773484677.

Adding to 12115867 its reverse (76851121), we get a palindrome (88966988).

The spelling of 12115867 in words is "twelve million, one hundred fifteen thousand, eight hundred sixty-seven".