12129253 has 4 divisors (see below), whose sum is σ = 12136320. Its totient is φ = 12122188.

The previous prime is 12129251. The next prime is 12129259. The reversal of 12129253 is 35292121.

It is a happy number.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 35292121 = 43 ⋅820747.

It is a cyclic number.

It is not a de Polignac number, because 12129253 - 2¹ = 12129251 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12129251) 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, 876 + ... + 5002.

It is an arithmetic number, because the mean of its divisors is an integer number (3034080).

Almost surely, 2^12129253 is an apocalyptic number.

It is an amenable number.

12129253 is a deficient number, since it is larger than the sum of its proper divisors (7067).

12129253 is an equidigital number, since it uses as much as digits as its factorization.

12129253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7066.

The product of its digits is 1080, while the sum is 25.

The square root of 12129253 is about 3482.7077109628. The cubic root of 12129253 is about 229.7619023128.

The spelling of 12129253 in words is "twelve million, one hundred twenty-nine thousand, two hundred fifty-three".