12099972 has 12 divisors (see below), whose sum is σ = 28233296. Its totient is φ = 4033320.

The previous prime is 12099959. The next prime is 12099991. The reversal of 12099972 is 27999021.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 12099972.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504154 + ... + 504177.

Almost surely, 2^12099972 is an apocalyptic number.

12099972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12099972 is an abundant number, since it is smaller than the sum of its proper divisors (16133324).

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

12099972 is a wasteful number, since it uses less digits than its factorization.

12099972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008338 (or 1008336 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 39.

The square root of 12099972 is about 3478.5014014659. The cubic root of 12099972 is about 229.5768653822.

The spelling of 12099972 in words is "twelve million, ninety-nine thousand, nine hundred seventy-two".