12751866 has 12 divisors (see below), whose sum is σ = 27629082. Its totient is φ = 4250616.

The previous prime is 12751841. The next prime is 12751873. The reversal of 12751866 is 66815721.

It can be written as a sum of positive squares in only one way, i.e., 6890625 + 5861241 = 2625^2 + 2421^2 .

It is a super-2 number, since 2×12751866² = 325220172963912, which contains 22 as substring.

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 12751866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 354201 + ... + 354236.

Almost surely, 2^12751866 is an apocalyptic number.

12751866 is an abundant number, since it is smaller than the sum of its proper divisors (14877216).

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

12751866 is a wasteful number, since it uses less digits than its factorization.

12751866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708445 (or 708442 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 12751866 is about 3570.9754969756. The cubic root of 12751866 is about 233.6278326793.

The spelling of 12751866 in words is "twelve million, seven hundred fifty-one thousand, eight hundred sixty-six".