12123569 has 2 divisors, whose sum is σ = 12123570. Its totient is φ = 12123568.

The previous prime is 12123563. The next prime is 12123571. The reversal of 12123569 is 96532121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8340544 + 3783025 = 2888^2 + 1945^2 .

It is a cyclic number.

It is not a de Polignac number, because 12123569 - 2²⁰ = 11074993 is a prime.

It is a super-2 number, since 2×12123569² = 293961850595522, which contains 22 as substring.

Together with 12123571, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12123563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061784 + 6061785.

It is an arithmetic number, because the mean of its divisors is an integer number (6061785).

Almost surely, 2^12123569 is an apocalyptic number.

It is an amenable number.

12123569 is a deficient number, since it is larger than the sum of its proper divisors (1).

12123569 is an equidigital number, since it uses as much as digits as its factorization.

12123569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 29.

The square root of 12123569 is about 3481.8915836080. The cubic root of 12123569 is about 229.7260064308.

The spelling of 12123569 in words is "twelve million, one hundred twenty-three thousand, five hundred sixty-nine".