12115091 has 2 divisors, whose sum is σ = 12115092. Its totient is φ = 12115090.

The previous prime is 12115039. The next prime is 12115123. The reversal of 12115091 is 19051121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12115091 - 2¹⁴ = 12098707 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12115031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6057545 + 6057546.

It is an arithmetic number, because the mean of its divisors is an integer number (6057546).

Almost surely, 2^12115091 is an apocalyptic number.

12115091 is a deficient number, since it is larger than the sum of its proper divisors (1).

12115091 is an equidigital number, since it uses as much as digits as its factorization.

12115091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 20.

The square root of 12115091 is about 3480.6739289971. The cubic root of 12115091 is about 229.6724448861.

The spelling of 12115091 in words is "twelve million, one hundred fifteen thousand, ninety-one".