12866405 has 8 divisors (see below), whose sum is σ = 15535392. Its totient is φ = 10229328.

The previous prime is 12866393. The next prime is 12866423. The reversal of 12866405 is 50466821.

12866405 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 12866405 - 2⁴ = 12866389 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

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, 7079 + ... + 8708.

It is an arithmetic number, because the mean of its divisors is an integer number (1941924).

Almost surely, 2^12866405 is an apocalyptic number.

It is an amenable number.

12866405 is a deficient number, since it is larger than the sum of its proper divisors (2668987).

12866405 is a wasteful number, since it uses less digits than its factorization.

12866405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15955.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 12866405 is about 3586.9771395982. The cubic root of 12866405 is about 234.3252411108.

The spelling of 12866405 in words is "twelve million, eight hundred sixty-six thousand, four hundred five".