12399900 has 36 divisors (see below), whose sum is σ = 35877912. Its totient is φ = 3306560.

The previous prime is 12399883. The next prime is 12399901. The reversal of 12399900 is 999321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12399901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20367 + ... + 20966.

Almost surely, 2^12399900 is an apocalyptic number.

12399900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12399900 is an abundant number, since it is smaller than the sum of its proper divisors (23478012).

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

12399900 is a wasteful number, since it uses less digits than its factorization.

12399900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41350 (or 41343 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 33.

The square root of 12399900 is about 3521.3491732573. The cubic root of 12399900 is about 231.4582832496.

The spelling of 12399900 in words is "twelve million, three hundred ninety-nine thousand, nine hundred".