12909224 has 8 divisors (see below), whose sum is σ = 24204810. Its totient is φ = 6454608.

The previous prime is 12909223. The next prime is 12909241. The reversal of 12909224 is 42290921.

12909224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 12376324 + 532900 = 3518^2 + 730^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (12909223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806819 + ... + 806834.

Almost surely, 2^12909224 is an apocalyptic number.

It is an amenable number.

12909224 is a deficient number, since it is larger than the sum of its proper divisors (11295586).

12909224 is a wasteful number, since it uses less digits than its factorization.

12909224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613659 (or 1613655 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 12909224 is about 3592.9408567356. The cubic root of 12909224 is about 234.5848956804.

The spelling of 12909224 in words is "twelve million, nine hundred nine thousand, two hundred twenty-four".