12013129 has 4 divisors (see below), whose sum is σ = 12182400. Its totient is φ = 11843860.

The previous prime is 12013117. The next prime is 12013189. The reversal of 12013129 is 92131021.

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: 92131021 = 149 ⋅618329.

It is a cyclic number.

It is not a de Polignac number, because 12013129 - 2⁵ = 12013097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12013109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84529 + ... + 84670.

It is an arithmetic number, because the mean of its divisors is an integer number (3045600).

Almost surely, 2^12013129 is an apocalyptic number.

It is an amenable number.

12013129 is a deficient number, since it is larger than the sum of its proper divisors (169271).

12013129 is an equidigital number, since it uses as much as digits as its factorization.

12013129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169270.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 12013129 is about 3465.9961050180. The cubic root of 12013129 is about 229.0263122642.

The spelling of 12013129 in words is "twelve million, thirteen thousand, one hundred twenty-nine".