12785578 has 32 divisors (see below), whose sum is σ = 22095360. Its totient is φ = 5503680.

The previous prime is 12785527. The next prime is 12785579. The reversal of 12785578 is 87558721.

12785578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12785579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23101 + ... + 23647.

It is an arithmetic number, because the mean of its divisors is an integer number (690480).

Almost surely, 2^12785578 is an apocalyptic number.

12785578 is a deficient number, since it is larger than the sum of its proper divisors (9309782).

12785578 is a wasteful number, since it uses less digits than its factorization.

12785578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622.

The product of its digits is 156800, while the sum is 43.

The square root of 12785578 is about 3575.6926601709. The cubic root of 12785578 is about 233.8335314909.

The spelling of 12785578 in words is "twelve million, seven hundred eighty-five thousand, five hundred seventy-eight".