12517986 has 48 divisors (see below), whose sum is σ = 28026432. Its totient is φ = 3705120.

The previous prime is 12517969. The next prime is 12517987. The reversal of 12517986 is 68971521.

It is a Harshad number since it is a multiple of its sum of digits (39).

Its product of digits (30240) is a multiple of the sum of its prime divisors (216).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12517987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74875 + ... + 75041.

It is an arithmetic number, because the mean of its divisors is an integer number (583884).

Almost surely, 2^12517986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12517986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14013216).

12517986 is an abundant number, since it is smaller than the sum of its proper divisors (15508446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12517986 is a wasteful number, since it uses less digits than its factorization.

12517986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247 (or 216 counting only the distinct ones).

The product of its digits is 30240, while the sum is 39.

The square root of 12517986 is about 3538.0765961183. The cubic root of 12517986 is about 232.1906998243.

The spelling of 12517986 in words is "twelve million, five hundred seventeen thousand, nine hundred eighty-six".