12671738 has 4 divisors (see below), whose sum is σ = 19007610. Its totient is φ = 6335868.

The previous prime is 12671719. The next prime is 12671741. The reversal of 12671738 is 83717621.

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., 9406489 + 3265249 = 3067^2 + 1807^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12671698 and 12671707.

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 as a sum of consecutive naturals, namely, 3167933 + ... + 3167936.

Almost surely, 2^12671738 is an apocalyptic number.

12671738 is a deficient number, since it is larger than the sum of its proper divisors (6335872).

12671738 is an equidigital number, since it uses as much as digits as its factorization.

12671738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6335871.

The product of its digits is 14112, while the sum is 35.

The square root of 12671738 is about 3559.7384735399. The cubic root of 12671738 is about 233.1374605630.

The spelling of 12671738 in words is "twelve million, six hundred seventy-one thousand, seven hundred thirty-eight".