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12939 = 319227

12939 has 8 divisors (see below), whose sum is σ = 18240. Its totient is φ = 8136.

The previous prime is 12923. The next prime is 12941. The reversal of 12939 is 93921.

12939 = T27 + T28 + ... + T45.

It is a happy number.

12939 is nontrivially palindromic in base 8.

12939 is digitally balanced in base 2, 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 not a de Polignac number, because 12939 - 24 = 12923 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (12919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57 + ... + 170.

It is an arithmetic number, because the mean of its divisors is an integer number (2280).

212939 is an apocalyptic number.

12939 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12939 is a deficient number, since it is larger than the sum of its proper divisors (5301).

12939 is a wasteful number, since it uses less digits than its factorization.

12939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249.

The product of its digits is 486, while the sum is 24.

The square root of 12939 is about 113.7497252744. The cubic root of 12939 is about 23.4765119172.

The spelling of 12939 in words is "twelve thousand, nine hundred thirty-nine".

Divisors: 1 3 19 57 227 681 4313 12939