12686258 has 8 divisors (see below), whose sum is σ = 20493228. Its totient is φ = 5855184.

The previous prime is 12686251. The next prime is 12686269. The reversal of 12686258 is 85268621.

It can be written as a sum of positive squares in 2 ways, for example, as 12369289 + 316969 = 3517^2 + 563^2 .

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

It is a super-2 number, since 2×12686258² = 321882284085128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12686251) 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 3 ways as a sum of consecutive naturals, for example, 243941 + ... + 243992.

Almost surely, 2^12686258 is an apocalyptic number.

12686258 is a deficient number, since it is larger than the sum of its proper divisors (7806970).

12686258 is a wasteful number, since it uses less digits than its factorization.

12686258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487948.

The product of its digits is 46080, while the sum is 38.

The square root of 12686258 is about 3561.7773653051. Note that the first 3 decimals coincide. The cubic root of 12686258 is about 233.2264739717.

The spelling of 12686258 in words is "twelve million, six hundred eighty-six thousand, two hundred fifty-eight".