12910861 has 4 divisors (see below), whose sum is σ = 13590400. Its totient is φ = 12231324.

The previous prime is 12910819. The next prime is 12910867. The reversal of 12910861 is 16801921.

It is a happy number.

12910861 is nontrivially palindromic in base 11.

12910861 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16801921 = 151 ⋅111271.

It is a cyclic number.

It is not a de Polignac number, because 12910861 - 2¹⁹ = 12386573 is a prime.

It is a super-2 number, since 2×12910861² = 333380663522642, 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 (12910867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339741 + ... + 339778.

It is an arithmetic number, because the mean of its divisors is an integer number (3397600).

Almost surely, 2^12910861 is an apocalyptic number.

It is an amenable number.

12910861 is a deficient number, since it is larger than the sum of its proper divisors (679539).

12910861 is an equidigital number, since it uses as much as digits as its factorization.

12910861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679538.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 12910861 is about 3593.1686573274. The cubic root of 12910861 is about 234.5948110516.

The spelling of 12910861 in words is "twelve million, nine hundred ten thousand, eight hundred sixty-one".