12661267 has 4 divisors (see below), whose sum is σ = 12682936. Its totient is φ = 12639600.

The previous prime is 12661261. The next prime is 12661273. The reversal of 12661267 is 76216621.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (12661261) and next prime (12661273).

It is a cyclic number.

It is not a de Polignac number, because 12661267 - 2¹¹ = 12659219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12661261) 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, 9933 + ... + 11134.

It is an arithmetic number, because the mean of its divisors is an integer number (3170734).

Almost surely, 2^12661267 is an apocalyptic number.

12661267 is a deficient number, since it is larger than the sum of its proper divisors (21669).

12661267 is an equidigital number, since it uses as much as digits as its factorization.

12661267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21668.

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

The square root of 12661267 is about 3558.2674154706. The cubic root of 12661267 is about 233.0732269363.

Adding to 12661267 its reverse (76216621), we get a palindrome (88877888).

The spelling of 12661267 in words is "twelve million, six hundred sixty-one thousand, two hundred sixty-seven".