12731738 has 4 divisors (see below), whose sum is σ = 19097610. Its totient is φ = 6365868.

The previous prime is 12731723. The next prime is 12731743. The reversal of 12731738 is 83713721.

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., 11580409 + 1151329 = 3403^2 + 1073^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3182933 + ... + 3182936.

Almost surely, 2^12731738 is an apocalyptic number.

12731738 is a deficient number, since it is larger than the sum of its proper divisors (6365872).

12731738 is an equidigital number, since it uses as much as digits as its factorization.

12731738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6365871.

The product of its digits is 7056, while the sum is 32.

The square root of 12731738 is about 3568.1561064505. The cubic root of 12731738 is about 233.5048457804.

The spelling of 12731738 in words is "twelve million, seven hundred thirty-one thousand, seven hundred thirty-eight".