12513887 has 4 divisors (see below), whose sum is σ = 13250016. Its totient is φ = 11777760.

The previous prime is 12513869. The next prime is 12513889. The reversal of 12513887 is 78831521.

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

It is a cyclic number.

It is not a de Polignac number, because 12513887 - 2¹⁴ = 12497503 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 (12513889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368039 + ... + 368072.

It is an arithmetic number, because the mean of its divisors is an integer number (3312504).

Almost surely, 2^12513887 is an apocalyptic number.

12513887 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

12513887 is a deficient number, since it is larger than the sum of its proper divisors (736129).

12513887 is an equidigital number, since it uses as much as digits as its factorization.

12513887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736128.

The product of its digits is 13440, while the sum is 35.

The square root of 12513887 is about 3537.4972791509. The cubic root of 12513887 is about 232.1653535325.

The spelling of 12513887 in words is "twelve million, five hundred thirteen thousand, eight hundred eighty-seven".