12126929 has 4 divisors (see below), whose sum is σ = 12158976. Its totient is φ = 12094884.

The previous prime is 12126923. The next prime is 12126931. The reversal of 12126929 is 92962121.

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, and also an emirpimes, since its reverse is a distinct semiprime: 92962121 = 7 ⋅13280303.

It is a cyclic number.

It is not a de Polignac number, because 12126929 - 2⁴ = 12126913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12126895 and 12126904.

It is not an unprimeable number, because it can be changed into a prime (12126923) 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 3 ways as a sum of consecutive naturals, for example, 15449 + ... + 16214.

It is an arithmetic number, because the mean of its divisors is an integer number (3039744).

Almost surely, 2^12126929 is an apocalyptic number.

It is an amenable number.

12126929 is a deficient number, since it is larger than the sum of its proper divisors (32047).

12126929 is an equidigital number, since it uses as much as digits as its factorization.

12126929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32046.

The product of its digits is 3888, while the sum is 32.

The square root of 12126929 is about 3482.3740465378. The cubic root of 12126929 is about 229.7472270269.

The spelling of 12126929 in words is "twelve million, one hundred twenty-six thousand, nine hundred twenty-nine".