12129200 has 30 divisors (see below), whose sum is σ = 29141364. Its totient is φ = 4851520.

The previous prime is 12129197. The next prime is 12129217. The reversal of 12129200 is 292121.

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 5 ways as a sum of consecutive naturals, for example, 14762 + ... + 15561.

Almost surely, 2^12129200 is an apocalyptic number.

12129200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12129200 is an abundant number, since it is smaller than the sum of its proper divisors (17012164).

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

12129200 is a wasteful number, since it uses less digits than its factorization.

12129200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30341 (or 30330 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 12129200 is about 3482.7001019324. The cubic root of 12129200 is about 229.7615676564.

The spelling of 12129200 in words is "twelve million, one hundred twenty-nine thousand, two hundred".