12129396 has 12 divisors (see below), whose sum is σ = 28301952. Its totient is φ = 4043128.

The previous prime is 12129379. The next prime is 12129407. The reversal of 12129396 is 69392121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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, 505380 + ... + 505403.

It is an arithmetic number, because the mean of its divisors is an integer number (2358496).

Almost surely, 2^12129396 is an apocalyptic number.

It is an amenable number.

12129396 is an abundant number, since it is smaller than the sum of its proper divisors (16172556).

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

12129396 is a wasteful number, since it uses less digits than its factorization.

12129396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010790 (or 1010788 counting only the distinct ones).

The product of its digits is 5832, while the sum is 33.

The square root of 12129396 is about 3482.7282409054. The cubic root of 12129396 is about 229.7628052490.

It can be divided in two parts, 12129 and 396, that multiplied together give a palindrome (4803084).

The spelling of 12129396 in words is "twelve million, one hundred twenty-nine thousand, three hundred ninety-six".