12870013 has 4 divisors (see below), whose sum is σ = 13860028. Its totient is φ = 11880000.

The previous prime is 12870007. The next prime is 12870017. The reversal of 12870013 is 31007821.

12870013 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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 1159929 + 11710084 = 1077^2 + 3422^2 .

It is a cyclic number.

It is not a de Polignac number, because 12870013 - 2⁵ = 12869981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12870017) 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, 494988 + ... + 495013.

It is an arithmetic number, because the mean of its divisors is an integer number (3465007).

Almost surely, 2^12870013 is an apocalyptic number.

12870013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12870013 is a deficient number, since it is larger than the sum of its proper divisors (990015).

12870013 is an equidigital number, since it uses as much as digits as its factorization.

12870013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990014.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 12870013 is about 3587.4800347877. The cubic root of 12870013 is about 234.3471422416.

Adding to 12870013 its reverse (31007821), we get a palindrome (43877834).

The spelling of 12870013 in words is "twelve million, eight hundred seventy thousand, thirteen".