12718387 has 4 divisors (see below), whose sum is σ = 13874616. Its totient is φ = 11562160.

The previous prime is 12718351. The next prime is 12718403. The reversal of 12718387 is 78381721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78381721 = 11 ⋅7125611.

It is a cyclic number.

It is not a de Polignac number, because 12718387 - 2¹⁵ = 12685619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12718187) 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, 578098 + ... + 578119.

It is an arithmetic number, because the mean of its divisors is an integer number (3468654).

Almost surely, 2^12718387 is an apocalyptic number.

12718387 is a deficient number, since it is larger than the sum of its proper divisors (1156229).

12718387 is a wasteful number, since it uses less digits than its factorization.

12718387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156228.

The product of its digits is 18816, while the sum is 37.

The square root of 12718387 is about 3566.2847614850. The cubic root of 12718387 is about 233.4231964525.

The spelling of 12718387 in words is "twelve million, seven hundred eighteen thousand, three hundred eighty-seven".