12638743 has 8 divisors (see below), whose sum is σ = 14327600. Its totient is φ = 11052288.

The previous prime is 12638741. The next prime is 12638761. The reversal of 12638743 is 34783621.

It is a happy number.

12638743 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12638743 - 2¹ = 12638741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12638699 and 12638708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12638741) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 25338 + ... + 25831.

It is an arithmetic number, because the mean of its divisors is an integer number (1790950).

Almost surely, 2^12638743 is an apocalyptic number.

12638743 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12638743 is a deficient number, since it is larger than the sum of its proper divisors (1688857).

12638743 is a wasteful number, since it uses less digits than its factorization.

12638743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51201.

The product of its digits is 24192, while the sum is 34.

The square root of 12638743 is about 3555.1009830946. The cubic root of 12638743 is about 232.9349348922.

The spelling of 12638743 in words is "twelve million, six hundred thirty-eight thousand, seven hundred forty-three".