12667261 has 4 divisors (see below), whose sum is σ = 13412412. Its totient is φ = 11922112.

The previous prime is 12667253. The next prime is 12667267. The reversal of 12667261 is 16276621.

It is a happy number.

12667261 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 2 ways, for example, as 6859161 + 5808100 = 2619^2 + 2410^2 .

It is a cyclic number.

It is not a de Polignac number, because 12667261 - 2³ = 12667253 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 (12667267) 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, 372550 + ... + 372583.

It is an arithmetic number, because the mean of its divisors is an integer number (3353103).

Almost surely, 2^12667261 is an apocalyptic number.

It is an amenable number.

12667261 is a deficient number, since it is larger than the sum of its proper divisors (745151).

12667261 is an equidigital number, since it uses as much as digits as its factorization.

12667261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745150.

The product of its digits is 6048, while the sum is 31.

The square root of 12667261 is about 3559.1095796561. The cubic root of 12667261 is about 233.1100010475.

The spelling of 12667261 in words is "twelve million, six hundred sixty-seven thousand, two hundred sixty-one".