12517138 has 8 divisors (see below), whose sum is σ = 18986940. Its totient is φ = 6188160.

The previous prime is 12517133. The next prime is 12517157. The reversal of 12517138 is 83171521.

It can be written as a sum of positive squares in 2 ways, for example, as 12299049 + 218089 = 3507^2 + 467^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12517138² = 313357487422088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12517133) 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, 34983 + ... + 35338.

Almost surely, 2^12517138 is an apocalyptic number.

12517138 is a deficient number, since it is larger than the sum of its proper divisors (6469802).

12517138 is an equidigital number, since it uses as much as digits as its factorization.

12517138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70412.

The product of its digits is 1680, while the sum is 28.

The square root of 12517138 is about 3537.9567549647. The cubic root of 12517138 is about 232.1854566444.

Adding to 12517138 its reverse (83171521), we get a palindrome (95688659).

The spelling of 12517138 in words is "twelve million, five hundred seventeen thousand, one hundred thirty-eight".