12939547 has 4 divisors (see below), whose sum is σ = 13502160. Its totient is φ = 12376936.

The previous prime is 12939541. The next prime is 12939571. The reversal of 12939547 is 74593921.

12939547 is digitally balanced in base 2, 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.

It is a cyclic number.

It is not a de Polignac number, because 12939547 - 2¹⁵ = 12906779 is a prime.

It is a Smith number, since the sum of its digits (40) 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 not an unprimeable number, because it can be changed into a prime (12939541) 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, 281272 + ... + 281317.

It is an arithmetic number, because the mean of its divisors is an integer number (3375540).

Almost surely, 2^12939547 is an apocalyptic number.

12939547 is a deficient number, since it is larger than the sum of its proper divisors (562613).

12939547 is an equidigital number, since it uses as much as digits as its factorization.

12939547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562612.

The product of its digits is 68040, while the sum is 40.

The square root of 12939547 is about 3597.1581839002. The cubic root of 12939547 is about 234.7684273800.

The spelling of 12939547 in words is "twelve million, nine hundred thirty-nine thousand, five hundred forty-seven".