12851587 has 4 divisors (see below), whose sum is σ = 14687536. Its totient is φ = 11015640.

The previous prime is 12851569. The next prime is 12851591. The reversal of 12851587 is 78515821.

12851587 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78515821 = 3709 ⋅21169.

It is a cyclic number.

It is not a de Polignac number, because 12851587 - 2¹¹ = 12849539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12851537) 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, 917964 + ... + 917977.

It is an arithmetic number, because the mean of its divisors is an integer number (3671884).

Almost surely, 2^12851587 is an apocalyptic number.

12851587 is a deficient number, since it is larger than the sum of its proper divisors (1835949).

12851587 is an equidigital number, since it uses as much as digits as its factorization.

12851587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835948.

The product of its digits is 22400, while the sum is 37.

The square root of 12851587 is about 3584.9110170268. The cubic root of 12851587 is about 234.2352505438.

It can be divided in two parts, 128 and 51587, that added together give a palindrome (51715).

The spelling of 12851587 in words is "twelve million, eight hundred fifty-one thousand, five hundred eighty-seven".