12099724 has 36 divisors (see below), whose sum is σ = 26214384. Its totient is φ = 4784832.

The previous prime is 12099721. The next prime is 12099739. The reversal of 12099724 is 42799021.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12099724.

It is not an unprimeable number, because it can be changed into a prime (12099721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3454 + ... + 6010.

Almost surely, 2^12099724 is an apocalyptic number.

12099724 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12099724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13107192).

12099724 is an abundant number, since it is smaller than the sum of its proper divisors (14114660).

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

12099724 is a wasteful number, since it uses less digits than its factorization.

12099724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2594 (or 2579 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 12099724 is about 3478.4657537483. The cubic root of 12099724 is about 229.5752969088.

The spelling of 12099724 in words is "twelve million, ninety-nine thousand, seven hundred twenty-four".