12729900 has 36 divisors (see below), whose sum is σ = 36832712. Its totient is φ = 3394560.

The previous prime is 12729877. The next prime is 12729901. The reversal of 12729900 is 992721.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12729901) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 20917 + ... + 21516.

Almost surely, 2^12729900 is an apocalyptic number.

12729900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12729900 is an abundant number, since it is smaller than the sum of its proper divisors (24102812).

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

12729900 is a wasteful number, since it uses less digits than its factorization.

12729900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42450 (or 42443 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 12729900 is about 3567.8985411584. The cubic root of 12729900 is about 233.4936087034.

The spelling of 12729900 in words is "twelve million, seven hundred twenty-nine thousand, nine hundred".