12740569 has 4 divisors (see below), whose sum is σ = 12818896. Its totient is φ = 12662244.

The previous prime is 12740549. The next prime is 12740573. The reversal of 12740569 is 96504721.

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: 96504721 = 29 ⋅3327749.

It is a cyclic number.

It is not a de Polignac number, because 12740569 - 2¹¹ = 12738521 is a prime.

It is a super-2 number, since 2×12740569² = 324644196887522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12740549) 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, 38919 + ... + 39244.

It is an arithmetic number, because the mean of its divisors is an integer number (3204724).

Almost surely, 2^12740569 is an apocalyptic number.

It is an amenable number.

12740569 is a deficient number, since it is larger than the sum of its proper divisors (78327).

12740569 is an equidigital number, since it uses as much as digits as its factorization.

12740569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78326.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 12740569 is about 3569.3933658256. The cubic root of 12740569 is about 233.5588212525.

The spelling of 12740569 in words is "twelve million, seven hundred forty thousand, five hundred sixty-nine".