12666253 has 4 divisors (see below), whose sum is σ = 12975228. Its totient is φ = 12357280.

The previous prime is 12666239. The next prime is 12666263. The reversal of 12666253 is 35266621.

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

It can be written as a sum of positive squares in 2 ways, for example, as 743044 + 11923209 = 862^2 + 3453^2 .

It is a cyclic number.

It is not a de Polignac number, because 12666253 - 2¹⁷ = 12535181 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12666263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154426 + ... + 154507.

It is an arithmetic number, because the mean of its divisors is an integer number (3243807).

Almost surely, 2^12666253 is an apocalyptic number.

It is an amenable number.

12666253 is a deficient number, since it is larger than the sum of its proper divisors (308975).

12666253 is an equidigital number, since it uses as much as digits as its factorization.

12666253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308974.

The product of its digits is 12960, while the sum is 31.

The square root of 12666253 is about 3558.9679683863. The cubic root of 12666253 is about 233.1038176241.

The spelling of 12666253 in words is "twelve million, six hundred sixty-six thousand, two hundred fifty-three".