12861397 has 2 divisors, whose sum is σ = 12861398. Its totient is φ = 12861396.

The previous prime is 12861391. The next prime is 12861403. The reversal of 12861397 is 79316821.

12861397 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (12861391) and next prime (12861403).

It can be written as a sum of positive squares in only one way, i.e., 12013156 + 848241 = 3466^2 + 921^2 .

It is a cyclic number.

It is not a de Polignac number, because 12861397 - 2⁷ = 12861269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12861391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6430698 + 6430699.

It is an arithmetic number, because the mean of its divisors is an integer number (6430699).

Almost surely, 2^12861397 is an apocalyptic number.

It is an amenable number.

12861397 is a deficient number, since it is larger than the sum of its proper divisors (1).

12861397 is an equidigital number, since it uses as much as digits as its factorization.

12861397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 37.

The square root of 12861397 is about 3586.2789908204. The cubic root of 12861397 is about 234.2948349718.

The spelling of 12861397 in words is "twelve million, eight hundred sixty-one thousand, three hundred ninety-seven".