12191385 has 8 divisors (see below), whose sum is σ = 19506240. Its totient is φ = 6502064.

The previous prime is 12191381. The next prime is 12191419. The reversal of 12191385 is 58319121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12191385 - 2² = 12191381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12191381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 406365 + ... + 406394.

It is an arithmetic number, because the mean of its divisors is an integer number (2438280).

Almost surely, 2^12191385 is an apocalyptic number.

12191385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12191385 is a deficient number, since it is larger than the sum of its proper divisors (7314855).

12191385 is an equidigital number, since it uses as much as digits as its factorization.

12191385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812767.

The product of its digits is 2160, while the sum is 30.

The square root of 12191385 is about 3491.6163878639. The cubic root of 12191385 is about 230.1535521574.

The spelling of 12191385 in words is "twelve million, one hundred ninety-one thousand, three hundred eighty-five".