12647738 has 4 divisors (see below), whose sum is σ = 18971610. Its totient is φ = 6323868.

The previous prime is 12647729. The next prime is 12647753. The reversal of 12647738 is 83774621.

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., 12482089 + 165649 = 3533^2 + 407^2 .

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, 3161933 + ... + 3161936.

Almost surely, 2^12647738 is an apocalyptic number.

12647738 is a deficient number, since it is larger than the sum of its proper divisors (6323872).

12647738 is an equidigital number, since it uses as much as digits as its factorization.

12647738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6323871.

The product of its digits is 56448, while the sum is 38.

The square root of 12647738 is about 3556.3658416985. The cubic root of 12647738 is about 232.9901817595.

The spelling of 12647738 in words is "twelve million, six hundred forty-seven thousand, seven hundred thirty-eight".