12865487 has 4 divisors (see below), whose sum is σ = 13424880. Its totient is φ = 12306096.

The previous prime is 12865477. The next prime is 12865493. The reversal of 12865487 is 78456821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78456821 = 41 ⋅1913581.

It is a cyclic number.

It is not a de Polignac number, because 12865487 - 2¹² = 12861391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12865417) 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, 279662 + ... + 279707.

It is an arithmetic number, because the mean of its divisors is an integer number (3356220).

Almost surely, 2^12865487 is an apocalyptic number.

12865487 is a deficient number, since it is larger than the sum of its proper divisors (559393).

12865487 is an equidigital number, since it uses as much as digits as its factorization.

12865487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559392.

The product of its digits is 107520, while the sum is 41.

The square root of 12865487 is about 3586.8491744148. The cubic root of 12865487 is about 234.3196680522.

The spelling of 12865487 in words is "twelve million, eight hundred sixty-five thousand, four hundred eighty-seven".