12638074 has 4 divisors (see below), whose sum is σ = 18957114. Its totient is φ = 6319036.

The previous prime is 12638057. The next prime is 12638077. The reversal of 12638074 is 47083621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12638025 + 49 = 3555^2 + 7^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12638077) by changing a digit.

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 as a sum of consecutive naturals, namely, 3159517 + ... + 3159520.

Almost surely, 2^12638074 is an apocalyptic number.

12638074 is a deficient number, since it is larger than the sum of its proper divisors (6319040).

12638074 is an equidigital number, since it uses as much as digits as its factorization.

12638074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6319039.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 12638074 is about 3555.0068916951. The cubic root of 12638074 is about 232.9308248784.

The spelling of 12638074 in words is "twelve million, six hundred thirty-eight thousand, seventy-four".