12947578 has 8 divisors (see below), whose sum is σ = 22195872. Its totient is φ = 5548956.

The previous prime is 12947573. The next prime is 12947587. The reversal of 12947578 is 87574921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12947573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 462400 + ... + 462427.

It is an arithmetic number, because the mean of its divisors is an integer number (2774484).

Almost surely, 2^12947578 is an apocalyptic number.

12947578 is a deficient number, since it is larger than the sum of its proper divisors (9248294).

12947578 is an equidigital number, since it uses as much as digits as its factorization.

12947578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924836.

The product of its digits is 141120, while the sum is 43.

The square root of 12947578 is about 3598.2743086096. The cubic root of 12947578 is about 234.8169874341.

The spelling of 12947578 in words is "twelve million, nine hundred forty-seven thousand, five hundred seventy-eight".