12709224 has 80 divisors (see below), whose sum is σ = 38855520. Its totient is φ = 3849120.

The previous prime is 12709219. The next prime is 12709237. The reversal of 12709224 is 42290721.

12709224 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 3565²-1.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6237 + ... + 8019.

It is an arithmetic number, because the mean of its divisors is an integer number (485694).

Almost surely, 2^12709224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12709224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19427760).

12709224 is an abundant number, since it is smaller than the sum of its proper divisors (26146296).

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

12709224 is a wasteful number, since it uses less digits than its factorization.

12709224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1812 (or 1799 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 12709224 is about 3564.9998597475. Note that the first 3 decimals coincide. The cubic root of 12709224 is about 233.3671261714.

Adding to 12709224 its reverse (42290721), we get a palindrome (54999945).

The spelling of 12709224 in words is "twelve million, seven hundred nine thousand, two hundred twenty-four".