12545971 has 4 divisors (see below), whose sum is σ = 13091472. Its totient is φ = 12000472.

The previous prime is 12545963. The next prime is 12545987. The reversal of 12545971 is 17954521.

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 12545971 - 2³ = 12545963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12545171) 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, 272716 + ... + 272761.

It is an arithmetic number, because the mean of its divisors is an integer number (3272868).

Almost surely, 2^12545971 is an apocalyptic number.

12545971 is a deficient number, since it is larger than the sum of its proper divisors (545501).

12545971 is an equidigital number, since it uses as much as digits as its factorization.

12545971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545500.

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

The square root of 12545971 is about 3542.0292206587. The cubic root of 12545971 is about 232.3635982595.

It can be divided in two parts, 1254 and 5971, that added together give a square (7225 = 85²).

The spelling of 12545971 in words is "twelve million, five hundred forty-five thousand, nine hundred seventy-one".