12099924 has 18 divisors (see below), whose sum is σ = 30586010. Its totient is φ = 4033296.

The previous prime is 12099917. The next prime is 12099929. The reversal of 12099924 is 42999021.

It can be written as a sum of positive squares in only one way, i.e., 12027024 + 72900 = 3468^2 + 270^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 336109 = 12099924 / (1 + 2 + 0 + 9 + 9 + 9 + 2 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12099929) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 168019 + ... + 168090.

Almost surely, 2^12099924 is an apocalyptic number.

It is an amenable number.

12099924 is an abundant number, since it is smaller than the sum of its proper divisors (18486086).

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

12099924 is a wasteful number, since it uses less digits than its factorization.

12099924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336119 (or 336114 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 12099924 is about 3478.4945019361. The cubic root of 12099924 is about 229.5765618084.

The spelling of 12099924 in words is "twelve million, ninety-nine thousand, nine hundred twenty-four".