12786505 has 8 divisors (see below), whose sum is σ = 16011072. Its totient is φ = 9784368.

The previous prime is 12786493. The next prime is 12786509. The reversal of 12786505 is 50568721.

12786505 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 12786505 - 2¹⁵ = 12753737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12786509) 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, 55479 + ... + 55708.

It is an arithmetic number, because the mean of its divisors is an integer number (2001384).

Almost surely, 2^12786505 is an apocalyptic number.

It is an amenable number.

12786505 is a deficient number, since it is larger than the sum of its proper divisors (3224567).

12786505 is a wasteful number, since it uses less digits than its factorization.

12786505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111215.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 12786505 is about 3575.8222830560. The cubic root of 12786505 is about 233.8391826093.

The spelling of 12786505 in words is "twelve million, seven hundred eighty-six thousand, five hundred five".