12511317 has 24 divisors (see below), whose sum is σ = 20901216. Its totient is φ = 6598368.

The previous prime is 12511277. The next prime is 12511349. The reversal of 12511317 is 71311521.

It is a happy number.

It is not a de Polignac number, because 12511317 - 2¹¹ = 12509269 is a prime.

It is a super-4 number, since 4×12511317⁴ (a number of 29 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 12511293 and 12511302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12511357) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1363 + ... + 5184.

It is an arithmetic number, because the mean of its divisors is an integer number (870884).

Almost surely, 2^12511317 is an apocalyptic number.

It is an amenable number.

12511317 is a deficient number, since it is larger than the sum of its proper divisors (8389899).

12511317 is a wasteful number, since it uses less digits than its factorization.

12511317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6577 (or 6570 counting only the distinct ones).

The product of its digits is 210, while the sum is 21.

The square root of 12511317 is about 3537.1340093358. The cubic root of 12511317 is about 232.1494590357.

Adding to 12511317 its reverse (71311521), we get a palindrome (83822838).

The spelling of 12511317 in words is "twelve million, five hundred eleven thousand, three hundred seventeen".