12205969 has 4 divisors (see below), whose sum is σ = 12257280. Its totient is φ = 12154660.

The previous prime is 12205957. The next prime is 12205981. The reversal of 12205969 is 96950221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96950221 = 23 ⋅4215227.

It is an interprime number because it is at equal distance from previous prime (12205957) and next prime (12205981).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12205969 is a prime.

It is a super-2 number, since 2×12205969² = 297971358457922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12205069) 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, 25297 + ... + 25774.

It is an arithmetic number, because the mean of its divisors is an integer number (3064320).

Almost surely, 2^12205969 is an apocalyptic number.

It is an amenable number.

12205969 is a deficient number, since it is larger than the sum of its proper divisors (51311).

12205969 is an equidigital number, since it uses as much as digits as its factorization.

12205969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51310.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 12205969 is about 3493.7041946908. The cubic root of 12205969 is about 230.2452896660.

The spelling of 12205969 in words is "twelve million, two hundred five thousand, nine hundred sixty-nine".