12129236 has 12 divisors (see below), whose sum is σ = 24258528. Its totient is φ = 5198232.

The previous prime is 12129233. The next prime is 12129251. The reversal of 12129236 is 63292121.

12129236 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

12129236 is an admirable number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12129233) 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, 216566 + ... + 216621.

It is an arithmetic number, because the mean of its divisors is an integer number (2021544).

Almost surely, 2^12129236 is an apocalyptic number.

It is an amenable number.

12129236 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12129236 is a wasteful number, since it uses less digits than its factorization.

12129236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433198 (or 433196 counting only the distinct ones).

The product of its digits is 1296, while the sum is 26.

The square root of 12129236 is about 3482.7052703322. The cubic root of 12129236 is about 229.7617949703.

The spelling of 12129236 in words is "twelve million, one hundred twenty-nine thousand, two hundred thirty-six".