12907986 has 64 divisors (see below), whose sum is σ = 32514048. Its totient is φ = 3325248.

The previous prime is 12907969. The next prime is 12908039. The reversal of 12907986 is 68970921.

It is a super-2 number, since 2×12907986² = 333232205152392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25411 + ... + 25913.

It is an arithmetic number, because the mean of its divisors is an integer number (508032).

Almost surely, 2^12907986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12907986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16257024).

12907986 is an abundant number, since it is smaller than the sum of its proper divisors (19606062).

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

12907986 is a wasteful number, since it uses less digits than its factorization.

12907986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 12907986 is about 3592.7685703368. The cubic root of 12907986 is about 234.5773965107.

The spelling of 12907986 in words is "twelve million, nine hundred seven thousand, nine hundred eighty-six".