12658 has 4 divisors (see below), whose sum is σ = 18990. Its totient is φ = 6328.

The previous prime is 12653. The next prime is 12659. The reversal of 12658 is 85621.

It is a happy number.

12658 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 9409 + 3249 = 97^2 + 57^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (12653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3163 + ... + 3166.

2¹²⁶⁵⁸ is an apocalyptic number.

12658 is a deficient number, since it is larger than the sum of its proper divisors (6332).

12658 is an equidigital number, since it uses as much as digits as its factorization.

12658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6331.

The product of its digits is 480, while the sum is 22.

The square root of 12658 is about 112.5077775089. The cubic root of 12658 is about 23.3053178502.

The spelling of 12658 in words is "twelve thousand, six hundred fifty-eight".