12665197 has 2 divisors, whose sum is σ = 12665198. Its totient is φ = 12665196.

The previous prime is 12665183. The next prime is 12665207. The reversal of 12665197 is 79156621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10536516 + 2128681 = 3246^2 + 1459^2 .

It is a cyclic number.

It is not a de Polignac number, because 12665197 - 2⁷ = 12665069 is a prime.

It is equal to p₈₂₈₇₉₃ and since 12665197 and 828793 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12665167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6332598 + 6332599.

It is an arithmetic number, because the mean of its divisors is an integer number (6332599).

Almost surely, 2^12665197 is an apocalyptic number.

It is an amenable number.

12665197 is a deficient number, since it is larger than the sum of its proper divisors (1).

12665197 is an equidigital number, since it uses as much as digits as its factorization.

12665197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 37.

The square root of 12665197 is about 3558.8196076789. The cubic root of 12665197 is about 233.0973394001.

The spelling of 12665197 in words is "twelve million, six hundred sixty-five thousand, one hundred ninety-seven".