12194891 has 8 divisors (see below), whose sum is σ = 12396384. Its totient is φ = 11995200.

The previous prime is 12194881. The next prime is 12194909. The reversal of 12194891 is 19849121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12194891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12194821) 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, 19991 + ... + 20591.

It is an arithmetic number, because the mean of its divisors is an integer number (1549548).

Almost surely, 2^12194891 is an apocalyptic number.

12194891 is a deficient number, since it is larger than the sum of its proper divisors (201493).

12194891 is a wasteful number, since it uses less digits than its factorization.

12194891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901.

The product of its digits is 5184, while the sum is 35.

The square root of 12194891 is about 3492.1184115090. The cubic root of 12194891 is about 230.1756125718.

The spelling of 12194891 in words is "twelve million, one hundred ninety-four thousand, eight hundred ninety-one".