12278969 has 4 divisors (see below), whose sum is σ = 12288144. Its totient is φ = 12269796.

The previous prime is 12278963. The next prime is 12278983. The reversal of 12278969 is 96987221.

It is a happy number.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12278969 is a prime.

It is a super-2 number, since 2×12278969² = 301546159405922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12278963) 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, 2147 + ... + 5400.

It is an arithmetic number, because the mean of its divisors is an integer number (3072036).

Almost surely, 2^12278969 is an apocalyptic number.

It is an amenable number.

12278969 is a deficient number, since it is larger than the sum of its proper divisors (9175).

12278969 is an equidigital number, since it uses as much as digits as its factorization.

12278969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9174.

The product of its digits is 108864, while the sum is 44.

The square root of 12278969 is about 3504.1359848042. The cubic root of 12278969 is about 230.7033854677.

The spelling of 12278969 in words is "twelve million, two hundred seventy-eight thousand, nine hundred sixty-nine".