12751638 has 8 divisors (see below), whose sum is σ = 25503288. Its totient is φ = 4250544.

The previous prime is 12751601. The next prime is 12751639. The reversal of 12751638 is 83615721.

It is a sphenic number, since it is the product of 3 distinct primes.

12751638 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12751599 and 12751608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12751639) 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, 1062631 + ... + 1062642.

It is an arithmetic number, because the mean of its divisors is an integer number (3187911).

Almost surely, 2^12751638 is an apocalyptic number.

12751638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12751638 is a wasteful number, since it uses less digits than its factorization.

12751638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125278.

The product of its digits is 10080, while the sum is 33.

The square root of 12751638 is about 3570.9435727830. The cubic root of 12751638 is about 233.6264402697.

The spelling of 12751638 in words is "twelve million, seven hundred fifty-one thousand, six hundred thirty-eight".