12865849 has 4 divisors (see below), whose sum is σ = 12879360. Its totient is φ = 12852340.

The previous prime is 12865843. The next prime is 12865859. The reversal of 12865849 is 94856821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12865849 - 2¹¹ = 12863801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12865843) 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, 5209 + ... + 7270.

It is an arithmetic number, because the mean of its divisors is an integer number (3219840).

Almost surely, 2^12865849 is an apocalyptic number.

It is an amenable number.

12865849 is a deficient number, since it is larger than the sum of its proper divisors (13511).

12865849 is a wasteful number, since it uses less digits than its factorization.

12865849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13510.

The product of its digits is 138240, while the sum is 43.

The square root of 12865849 is about 3586.8996361761. The cubic root of 12865849 is about 234.3218657387.

The spelling of 12865849 in words is "twelve million, eight hundred sixty-five thousand, eight hundred forty-nine".