12915571 has 4 divisors (see below), whose sum is σ = 12924712. Its totient is φ = 12906432.

The previous prime is 12915559. The next prime is 12915583. The reversal of 12915571 is 17551921.

12915571 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (12915559) and next prime (12915583).

It is a cyclic number.

It is not a de Polignac number, because 12915571 - 2⁹ = 12915059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12015571) 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, 1950 + ... + 5443.

It is an arithmetic number, because the mean of its divisors is an integer number (3231178).

Almost surely, 2^12915571 is an apocalyptic number.

12915571 is a deficient number, since it is larger than the sum of its proper divisors (9141).

12915571 is an equidigital number, since it uses as much as digits as its factorization.

12915571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9140.

The product of its digits is 3150, while the sum is 31.

The square root of 12915571 is about 3593.8240079336. The cubic root of 12915571 is about 234.6233350264.

The spelling of 12915571 in words is "twelve million, nine hundred fifteen thousand, five hundred seventy-one".