12929557 has 4 divisors (see below), whose sum is σ = 13610080. Its totient is φ = 12249036.

The previous prime is 12929551. The next prime is 12929561. The reversal of 12929557 is 75592921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12929557 - 2³ = 12929549 is a prime.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12929551) 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, 340233 + ... + 340270.

It is an arithmetic number, because the mean of its divisors is an integer number (3402520).

Almost surely, 2^12929557 is an apocalyptic number.

It is an amenable number.

12929557 is a deficient number, since it is larger than the sum of its proper divisors (680523).

12929557 is an equidigital number, since it uses as much as digits as its factorization.

12929557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680522.

The product of its digits is 56700, while the sum is 40.

The square root of 12929557 is about 3595.7693196311. The cubic root of 12929557 is about 234.7079940324.

The spelling of 12929557 in words is "twelve million, nine hundred twenty-nine thousand, five hundred fifty-seven".