12704578 has 8 divisors (see below), whose sum is σ = 20059920. Its totient is φ = 6017940.

The previous prime is 12704567. The next prime is 12704591. The reversal of 12704578 is 87540721.

It is a happy number.

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

It is a super-2 number, since 2×12704578² = 322812604316168, which contains 22 as substring.

It is an unprimeable number.

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, 167128 + ... + 167203.

It is an arithmetic number, because the mean of its divisors is an integer number (2507490).

Almost surely, 2^12704578 is an apocalyptic number.

12704578 is a deficient number, since it is larger than the sum of its proper divisors (7355342).

12704578 is a wasteful number, since it uses less digits than its factorization.

12704578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334352.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 12704578 is about 3564.3481872567. The cubic root of 12704578 is about 233.3386860450.

The spelling of 12704578 in words is "twelve million, seven hundred four thousand, five hundred seventy-eight".