12999924 has 72 divisors (see below), whose sum is σ = 38088960. Its totient is φ = 3661632.

The previous prime is 12999919. The next prime is 12999929. The reversal of 12999924 is 42999921.

It is an interprime number because it is at equal distance from previous prime (12999919) and next prime (12999929).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 12999924.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12999929) 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 23 ways as a sum of consecutive naturals, for example, 19582 + ... + 20234.

Almost surely, 2^12999924 is an apocalyptic number.

12999924 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 12999924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19044480).

12999924 is an abundant number, since it is smaller than the sum of its proper divisors (25089036).

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

12999924 is a wasteful number, since it uses less digits than its factorization.

12999924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749 (or 744 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 12999924 is about 3605.5407361449. The cubic root of 12999924 is about 235.1330105624.

The spelling of 12999924 in words is "twelve million, nine hundred ninety-nine thousand, nine hundred twenty-four".