12705727 has 4 divisors (see below), whose sum is σ = 12729096. Its totient is φ = 12682360.

The previous prime is 12705703. The next prime is 12705731. The reversal of 12705727 is 72750721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72750721 = 197 ⋅369293.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12705727 is a prime.

It is a super-2 number, since 2×12705727² = 322870997197058, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12705757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10849 + ... + 11962.

It is an arithmetic number, because the mean of its divisors is an integer number (3182274).

Almost surely, 2^12705727 is an apocalyptic number.

12705727 is a deficient number, since it is larger than the sum of its proper divisors (23369).

12705727 is an equidigital number, since it uses as much as digits as its factorization.

12705727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23368.

The product of its (nonzero) digits is 6860, while the sum is 31.

The square root of 12705727 is about 3564.5093631522. The cubic root of 12705727 is about 233.3457202041.

The spelling of 12705727 in words is "twelve million, seven hundred five thousand, seven hundred twenty-seven".