12162391 has 2 divisors, whose sum is σ = 12162392. Its totient is φ = 12162390.

The previous prime is 12162383. The next prime is 12162401. The reversal of 12162391 is 19326121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12162391 - 2³ = 12162383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12162341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6081195 + 6081196.

It is an arithmetic number, because the mean of its divisors is an integer number (6081196).

Almost surely, 2^12162391 is an apocalyptic number.

12162391 is a deficient number, since it is larger than the sum of its proper divisors (1).

12162391 is an equidigital number, since it uses as much as digits as its factorization.

12162391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 25.

The square root of 12162391 is about 3487.4619711188. The cubic root of 12162391 is about 229.9709541140.

The spelling of 12162391 in words is "twelve million, one hundred sixty-two thousand, three hundred ninety-one".