12851287 has 4 divisors (see below), whose sum is σ = 12884056. Its totient is φ = 12818520.

The previous prime is 12851261. The next prime is 12851309. The reversal of 12851287 is 78215821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12851287 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 (12854287) 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, 15789 + ... + 16582.

It is an arithmetic number, because the mean of its divisors is an integer number (3221014).

Almost surely, 2^12851287 is an apocalyptic number.

12851287 is a deficient number, since it is larger than the sum of its proper divisors (32769).

12851287 is an equidigital number, since it uses as much as digits as its factorization.

12851287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32768.

The product of its digits is 8960, while the sum is 34.

The square root of 12851287 is about 3584.8691747399. The cubic root of 12851287 is about 234.2334279123.

It can be divided in two parts, 128 and 51287, that added together give a palindrome (51415).

The spelling of 12851287 in words is "twelve million, eight hundred fifty-one thousand, two hundred eighty-seven".