12641706 has 72 divisors (see below), whose sum is σ = 34785504. Its totient is φ = 3281040.

The previous prime is 12641683. The next prime is 12641723. The reversal of 12641706 is 60714621.

12641706 is a `hidden beast` number, since 12 + 641 + 7 + 0 + 6 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12641706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9051 + ... + 10353.

It is an arithmetic number, because the mean of its divisors is an integer number (483132).

Almost surely, 2^12641706 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12641706, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17392752).

12641706 is an abundant number, since it is smaller than the sum of its proper divisors (22143798).

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

12641706 is a wasteful number, since it uses less digits than its factorization.

12641706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336 (or 1326 counting only the distinct ones).

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

The square root of 12641706 is about 3555.5176838261. The cubic root of 12641706 is about 232.9531363933.

The spelling of 12641706 in words is "twelve million, six hundred forty-one thousand, seven hundred six".