12756705 has 16 divisors (see below), whose sum is σ = 21981120. Its totient is φ = 6280128.

The previous prime is 12756703. The next prime is 12756707. The reversal of 12756705 is 50765721.

It is an interprime number because it is at equal distance from previous prime (12756703) and next prime (12756707).

It is not a de Polignac number, because 12756705 - 2¹ = 12756703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12756703) 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 15 ways as a sum of consecutive naturals, for example, 32515 + ... + 32904.

It is an arithmetic number, because the mean of its divisors is an integer number (1373820).

Almost surely, 2^12756705 is an apocalyptic number.

12756705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12756705 is a deficient number, since it is larger than the sum of its proper divisors (9224415).

12756705 is a wasteful number, since it uses less digits than its factorization.

12756705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65440.

The product of its (nonzero) digits is 14700, while the sum is 33.

The square root of 12756705 is about 3571.6529786641. The cubic root of 12756705 is about 233.6573808284.

The spelling of 12756705 in words is "twelve million, seven hundred fifty-six thousand, seven hundred five".