12191411 has 4 divisors (see below), whose sum is σ = 12199824. Its totient is φ = 12183000.

The previous prime is 12191381. The next prime is 12191419. The reversal of 12191411 is 11419121.

12191411 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12191411 - 2²² = 7997107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12191419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1415 + ... + 5136.

It is an arithmetic number, because the mean of its divisors is an integer number (3049956).

Almost surely, 2^12191411 is an apocalyptic number.

12191411 is the 1562-nd centered decagonal number.

12191411 is a deficient number, since it is larger than the sum of its proper divisors (8413).

12191411 is an equidigital number, since it uses as much as digits as its factorization.

12191411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8412.

The product of its digits is 72, while the sum is 20.

The square root of 12191411 is about 3491.6201110659. The cubic root of 12191411 is about 230.1537157699.

The spelling of 12191411 in words is "twelve million, one hundred ninety-one thousand, four hundred eleven".