12929139 has 40 divisors (see below), whose sum is σ = 21063680. Its totient is φ = 7873200.

The previous prime is 12929117. The next prime is 12929141. The reversal of 12929139 is 93192921.

It is a happy number.

It is not a de Polignac number, because 12929139 - 2¹⁵ = 12896371 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

Its product of digits (8748) is a multiple of the sum of its prime divisors (324).

It is not an unprimeable number, because it can be changed into a prime (12929149) 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 39 ways as a sum of consecutive naturals, for example, 47574 + ... + 47844.

It is an arithmetic number, because the mean of its divisors is an integer number (526592).

Almost surely, 2^12929139 is an apocalyptic number.

12929139 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12929139 is a deficient number, since it is larger than the sum of its proper divisors (8134541).

12929139 is a wasteful number, since it uses less digits than its factorization.

12929139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333 (or 324 counting only the distinct ones).

The product of its digits is 8748, while the sum is 36.

The square root of 12929139 is about 3595.7111952992. The cubic root of 12929139 is about 234.7054647115.

The spelling of 12929139 in words is "twelve million, nine hundred twenty-nine thousand, one hundred thirty-nine".