12713578 has 4 divisors (see below), whose sum is σ = 19070370. Its totient is φ = 6356788.

The previous prime is 12713573. The next prime is 12713579. The reversal of 12713578 is 87531721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11854249 + 859329 = 3443^2 + 927^2 .

It is not an unprimeable number, because it can be changed into a prime (12713573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3178393 + ... + 3178396.

Almost surely, 2^12713578 is an apocalyptic number.

12713578 is a deficient number, since it is larger than the sum of its proper divisors (6356792).

12713578 is an equidigital number, since it uses as much as digits as its factorization.

12713578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6356791.

The product of its digits is 11760, while the sum is 34.

The square root of 12713578 is about 3565.6104666663. The cubic root of 12713578 is about 233.3937725520.

The spelling of 12713578 in words is "twelve million, seven hundred thirteen thousand, five hundred seventy-eight".