12261217 has 4 divisors (see below), whose sum is σ = 12288276. Its totient is φ = 12234160.

The previous prime is 12261211. The next prime is 12261253. The reversal of 12261217 is 71216221.

It is a happy number.

12261217 is digitally balanced in base 3, 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, and also an emirpimes, since its reverse is a distinct semiprime: 71216221 = 41 ⋅1736981.

It can be written as a sum of positive squares in 2 ways, for example, as 7834401 + 4426816 = 2799^2 + 2104^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12261217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12261211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12838 + ... + 13759.

It is an arithmetic number, because the mean of its divisors is an integer number (3072069).

Almost surely, 2^12261217 is an apocalyptic number.

It is an amenable number.

12261217 is a deficient number, since it is larger than the sum of its proper divisors (27059).

12261217 is an equidigital number, since it uses as much as digits as its factorization.

12261217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27058.

The product of its digits is 336, while the sum is 22.

The square root of 12261217 is about 3501.6020619139. The cubic root of 12261217 is about 230.5921540412.

Adding to 12261217 its reverse (71216221), we get a palindrome (83477438).

The spelling of 12261217 in words is "twelve million, two hundred sixty-one thousand, two hundred seventeen".