12775806 has 40 divisors (see below), whose sum is σ = 30317760. Its totient is φ = 4007232.

The previous prime is 12775783. The next prime is 12775817. The reversal of 12775806 is 60857721.

12775806 is a `hidden beast` number, since 1 + 2 + 77 + 580 + 6 = 666.

It is a Curzon number.

It is a congruent number.

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, 435 + ... + 5073.

It is an arithmetic number, because the mean of its divisors is an integer number (757944).

Almost surely, 2^12775806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12775806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15158880).

12775806 is an abundant number, since it is smaller than the sum of its proper divisors (17541954).

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

12775806 is a wasteful number, since it uses less digits than its factorization.

12775806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4670 (or 4661 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 12775806 is about 3574.3259504416. The cubic root of 12775806 is about 233.7739434232.

The spelling of 12775806 in words is "twelve million, seven hundred seventy-five thousand, eight hundred six".