12661197 has 8 divisors (see below), whose sum is σ = 17463840. Its totient is φ = 8149680.

The previous prime is 12661183. The next prime is 12661211. The reversal of 12661197 is 79116621.

It is an interprime number because it is at equal distance from previous prime (12661183) and next prime (12661211).

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

It is not a de Polignac number, because 12661197 - 2⁸ = 12660941 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12661147) 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, 72679 + ... + 72852.

It is an arithmetic number, because the mean of its divisors is an integer number (2182980).

Almost surely, 2^12661197 is an apocalyptic number.

It is an amenable number.

12661197 is a deficient number, since it is larger than the sum of its proper divisors (4802643).

12661197 is a wasteful number, since it uses less digits than its factorization.

12661197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145563.

The product of its digits is 4536, while the sum is 33.

The square root of 12661197 is about 3558.2575792092. The cubic root of 12661197 is about 233.0727974070.

The spelling of 12661197 in words is "twelve million, six hundred sixty-one thousand, one hundred ninety-seven".