12784871 has 4 divisors (see below), whose sum is σ = 13947144. Its totient is φ = 11622600.

The previous prime is 12784847. The next prime is 12784897. The reversal of 12784871 is 17848721.

12784871 is digitally balanced in base 2, 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.

It is not a de Polignac number, because 12784871 - 2¹⁴ = 12768487 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 (12784831) 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, 581120 + ... + 581141.

It is an arithmetic number, because the mean of its divisors is an integer number (3486786).

Almost surely, 2^12784871 is an apocalyptic number.

12784871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12784871 is a deficient number, since it is larger than the sum of its proper divisors (1162273).

12784871 is a wasteful number, since it uses less digits than its factorization.

12784871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162272.

The product of its digits is 25088, while the sum is 38.

The square root of 12784871 is about 3575.5937968399. The cubic root of 12784871 is about 233.8292213389.

It can be divided in two parts, 1 and 2784871, that added together give a palindrome (2784872).

The spelling of 12784871 in words is "twelve million, seven hundred eighty-four thousand, eight hundred seventy-one".