12129404 has 12 divisors (see below), whose sum is σ = 24258864. Its totient is φ = 5198304.

The previous prime is 12129379. The next prime is 12129407. The reversal of 12129404 is 40492121.

12129404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

12129404 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 12129404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12129407) 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, 216569 + ... + 216624.

It is an arithmetic number, because the mean of its divisors is an integer number (2021572).

Almost surely, 2^12129404 is an apocalyptic number.

12129404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12129404 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.

12129404 is a wasteful number, since it uses less digits than its factorization.

12129404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433204 (or 433202 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 12129404 is about 3482.7293894301. The cubic root of 12129404 is about 229.7628557627.

The spelling of 12129404 in words is "twelve million, one hundred twenty-nine thousand, four hundred four".