12578671 has 4 divisors (see below), whose sum is σ = 14375632. Its totient is φ = 10781712.

The previous prime is 12578611. The next prime is 12578681. The reversal of 12578671 is 17687521.

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

It is a cyclic number.

It is not a de Polignac number, because 12578671 - 2¹¹ = 12576623 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12578671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12578611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 898470 + ... + 898483.

It is an arithmetic number, because the mean of its divisors is an integer number (3593908).

Almost surely, 2^12578671 is an apocalyptic number.

12578671 is a deficient number, since it is larger than the sum of its proper divisors (1796961).

12578671 is an equidigital number, since it uses as much as digits as its factorization.

12578671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796960.

The product of its digits is 23520, while the sum is 37.

The square root of 12578671 is about 3546.6422148280. The cubic root of 12578671 is about 232.5653017327.

The spelling of 12578671 in words is "twelve million, five hundred seventy-eight thousand, six hundred seventy-one".