12690191 has 8 divisors (see below), whose sum is σ = 13191168. Its totient is φ = 12195000.

The previous prime is 12690179. The next prime is 12690199. The reversal of 12690191 is 19109621.

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 12690191 - 2¹⁰ = 12689167 is a prime.

It is a super-2 number, since 2×12690191² = 322081895232962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12690199) 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, 3326 + ... + 6036.

It is an arithmetic number, because the mean of its divisors is an integer number (1648896).

Almost surely, 2^12690191 is an apocalyptic number.

12690191 is a deficient number, since it is larger than the sum of its proper divisors (500977).

12690191 is a wasteful number, since it uses less digits than its factorization.

12690191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2893.

The product of its (nonzero) digits is 972, while the sum is 29.

The square root of 12690191 is about 3562.3294345133. The cubic root of 12690191 is about 233.2505731439.

The spelling of 12690191 in words is "twelve million, six hundred ninety thousand, one hundred ninety-one".