12909724 has 6 divisors (see below), whose sum is σ = 22592024. Its totient is φ = 6454860.

The previous prime is 12909709. The next prime is 12909751. The reversal of 12909724 is 42790921.

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 12909724.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1613712 + ... + 1613719.

Almost surely, 2^12909724 is an apocalyptic number.

It is an amenable number.

12909724 is a deficient number, since it is larger than the sum of its proper divisors (9682300).

12909724 is a wasteful number, since it uses less digits than its factorization.

12909724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3227435 (or 3227433 counting only the distinct ones).

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

The square root of 12909724 is about 3593.0104369456. The cubic root of 12909724 is about 234.5879242883.

The spelling of 12909724 in words is "twelve million, nine hundred nine thousand, seven hundred twenty-four".