12945571 has 4 divisors (see below), whose sum is σ = 13392000. Its totient is φ = 12499144.

The previous prime is 12945563. The next prime is 12945577. The reversal of 12945571 is 17554921.

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 12945571 - 2³ = 12945563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12945577) 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, 223171 + ... + 223228.

It is an arithmetic number, because the mean of its divisors is an integer number (3348000).

Almost surely, 2^12945571 is an apocalyptic number.

12945571 is a deficient number, since it is larger than the sum of its proper divisors (446429).

12945571 is an equidigital number, since it uses as much as digits as its factorization.

12945571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446428.

The product of its digits is 12600, while the sum is 34.

The square root of 12945571 is about 3597.9954141160. The cubic root of 12945571 is about 234.8048538380.

The spelling of 12945571 in words is "twelve million, nine hundred forty-five thousand, five hundred seventy-one".