12942569 has 4 divisors (see below), whose sum is σ = 12958596. Its totient is φ = 12926544.

The previous prime is 12942539. The next prime is 12942571. The reversal of 12942569 is 96524921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96524921 = 19 ⋅5080259.

It can be written as a sum of positive squares in 2 ways, for example, as 6250000 + 6692569 = 2500^2 + 2587^2 .

It is a cyclic number.

It is not a de Polignac number, because 12942569 - 2²⁰ = 11893993 is a prime.

It is a super-2 number, since 2×12942569² = 335020184639522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12942509) 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, 6734 + ... + 8439.

It is an arithmetic number, because the mean of its divisors is an integer number (3239649).

Almost surely, 2^12942569 is an apocalyptic number.

It is an amenable number.

12942569 is a deficient number, since it is larger than the sum of its proper divisors (16027).

12942569 is an equidigital number, since it uses as much as digits as its factorization.

12942569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16026.

The product of its digits is 38880, while the sum is 38.

The square root of 12942569 is about 3597.5782131873. The cubic root of 12942569 is about 234.7867024907.

The spelling of 12942569 in words is "twelve million, nine hundred forty-two thousand, five hundred sixty-nine".