12845817 has 16 divisors (see below), whose sum is σ = 19301760. Its totient is φ = 8442000.

The previous prime is 12845809. The next prime is 12845821. The reversal of 12845817 is 71854821.

It is not a de Polignac number, because 12845817 - 2³ = 12845809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12845837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1434 + ... + 5267.

It is an arithmetic number, because the mean of its divisors is an integer number (1206360).

Almost surely, 2^12845817 is an apocalyptic number.

It is an amenable number.

12845817 is a deficient number, since it is larger than the sum of its proper divisors (6455943).

12845817 is an equidigital number, since it uses as much as digits as its factorization.

12845817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6781 (or 6775 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 12845817 is about 3584.1061647222. The cubic root of 12845817 is about 234.2001902898.

The spelling of 12845817 in words is "twelve million, eight hundred forty-five thousand, eight hundred seventeen".