12975986 has 4 divisors (see below), whose sum is σ = 19463982. Its totient is φ = 6487992.

The previous prime is 12975983. The next prime is 12976009. The reversal of 12975986 is 68957921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6630625 + 6345361 = 2575^2 + 2519^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12975986.

It is not an unprimeable number, because it can be changed into a prime (12975983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3243995 + ... + 3243998.

Almost surely, 2^12975986 is an apocalyptic number.

12975986 is a deficient number, since it is larger than the sum of its proper divisors (6487996).

12975986 is an equidigital number, since it uses as much as digits as its factorization.

12975986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6487995.

The product of its digits is 272160, while the sum is 47.

The square root of 12975986 is about 3602.2195935284. The cubic root of 12975986 is about 234.9885976058.

The spelling of 12975986 in words is "twelve million, nine hundred seventy-five thousand, nine hundred eighty-six".