12739578 has 8 divisors (see below), whose sum is σ = 25479168. Its totient is φ = 4246524.

The previous prime is 12739577. The next prime is 12739589. The reversal of 12739578 is 87593721.

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

12739578 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (12739577) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1061626 + ... + 1061637.

It is an arithmetic number, because the mean of its divisors is an integer number (3184896).

Almost surely, 2^12739578 is an apocalyptic number.

12739578 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12739578 is a wasteful number, since it uses less digits than its factorization.

12739578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123268.

The product of its digits is 105840, while the sum is 42.

The square root of 12739578 is about 3569.2545440190. The cubic root of 12739578 is about 233.5527654583.

The spelling of 12739578 in words is "twelve million, seven hundred thirty-nine thousand, five hundred seventy-eight".