12718137 has 4 divisors (see below), whose sum is σ = 16957520. Its totient is φ = 8478756.

The previous prime is 12718093. The next prime is 12718157. The reversal of 12718137 is 73181721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12718137 - 2⁷ = 12718009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12718157) 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, 2119687 + ... + 2119692.

It is an arithmetic number, because the mean of its divisors is an integer number (4239380).

Almost surely, 2^12718137 is an apocalyptic number.

It is an amenable number.

12718137 is a deficient number, since it is larger than the sum of its proper divisors (4239383).

12718137 is an equidigital number, since it uses as much as digits as its factorization.

12718137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4239382.

The product of its digits is 2352, while the sum is 30.

The square root of 12718137 is about 3566.2497108307. The cubic root of 12718137 is about 233.4216670086.

Adding to 12718137 its reverse (73181721), we get a palindrome (85899858).

The spelling of 12718137 in words is "twelve million, seven hundred eighteen thousand, one hundred thirty-seven".