12947378 has 4 divisors (see below), whose sum is σ = 19421070. Its totient is φ = 6473688.

The previous prime is 12947351. The next prime is 12947381. The reversal of 12947378 is 87374921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87374921 = 911 ⋅95911.

It can be written as a sum of positive squares in only one way, i.e., 7689529 + 5257849 = 2773^2 + 2293^2 .

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, 3236843 + ... + 3236846.

Almost surely, 2^12947378 is an apocalyptic number.

12947378 is a deficient number, since it is larger than the sum of its proper divisors (6473692).

12947378 is an equidigital number, since it uses as much as digits as its factorization.

12947378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6473691.

The product of its digits is 84672, while the sum is 41.

The square root of 12947378 is about 3598.2465174026. The cubic root of 12947378 is about 234.8157783627.

The spelling of 12947378 in words is "twelve million, nine hundred forty-seven thousand, three hundred seventy-eight".