12615191 has 2 divisors, whose sum is σ = 12615192. Its totient is φ = 12615190.

The previous prime is 12615181. The next prime is 12615199. The reversal of 12615191 is 19151621.

12615191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12615191 - 2²² = 8420887 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12615191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12615199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6307595 + 6307596.

It is an arithmetic number, because the mean of its divisors is an integer number (6307596).

Almost surely, 2^12615191 is an apocalyptic number.

12615191 is a deficient number, since it is larger than the sum of its proper divisors (1).

12615191 is an equidigital number, since it uses as much as digits as its factorization.

12615191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 26.

The square root of 12615191 is about 3551.7870150109. The cubic root of 12615191 is about 232.7901553349.

The spelling of 12615191 in words is "twelve million, six hundred fifteen thousand, one hundred ninety-one".