12851585 has 4 divisors (see below), whose sum is σ = 15421908. Its totient is φ = 10281264.

The previous prime is 12851569. The next prime is 12851591. The reversal of 12851585 is 58515821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8386816 + 4464769 = 2896^2 + 2113^2 .

It is a cyclic number.

It is not a de Polignac number, because 12851585 - 2⁴ = 12851569 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1285154 + ... + 1285163.

It is an arithmetic number, because the mean of its divisors is an integer number (3855477).

Almost surely, 2^12851585 is an apocalyptic number.

It is an amenable number.

12851585 is a deficient number, since it is larger than the sum of its proper divisors (2570323).

12851585 is an equidigital number, since it uses as much as digits as its factorization.

12851585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2570322.

The product of its digits is 16000, while the sum is 35.

The square root of 12851585 is about 3584.9107380798. The cubic root of 12851585 is about 234.2352383930.

The spelling of 12851585 in words is "twelve million, eight hundred fifty-one thousand, five hundred eighty-five".