12947571 has 24 divisors (see below), whose sum is σ = 23019360. Its totient is φ = 6829056.

The previous prime is 12947563. The next prime is 12947573. The reversal of 12947571 is 17574921.

It is a happy number.

It is not a de Polignac number, because 12947571 - 2³ = 12947563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12947573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7086 + ... + 8723.

It is an arithmetic number, because the mean of its divisors is an integer number (959140).

Almost surely, 2^12947571 is an apocalyptic number.

12947571 is a deficient number, since it is larger than the sum of its proper divisors (10071789).

12947571 is a wasteful number, since it uses less digits than its factorization.

12947571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15835 (or 15832 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 12947571 is about 3598.2733359210. The cubic root of 12947571 is about 234.8169451168.

The spelling of 12947571 in words is "twelve million, nine hundred forty-seven thousand, five hundred seventy-one".