12661724 has 12 divisors (see below), whose sum is σ = 22201704. Its totient is φ = 6318384.

The previous prime is 12661723. The next prime is 12661739. The reversal of 12661724 is 42716621.

12661724 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12661721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 614 + ... + 5069.

It is an arithmetic number, because the mean of its divisors is an integer number (1850142).

Almost surely, 2^12661724 is an apocalyptic number.

It is an amenable number.

12661724 is a deficient number, since it is larger than the sum of its proper divisors (9539980).

12661724 is a wasteful number, since it uses less digits than its factorization.

12661724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6244 (or 6242 counting only the distinct ones).

The product of its digits is 4032, while the sum is 29.

The square root of 12661724 is about 3558.3316315375. The cubic root of 12661724 is about 233.0760311102.

The spelling of 12661724 in words is "twelve million, six hundred sixty-one thousand, seven hundred twenty-four".