12723565 has 8 divisors (see below), whose sum is σ = 16166520. Its totient is φ = 9580032.

The previous prime is 12723539. The next prime is 12723569. The reversal of 12723565 is 56532721.

It can be written as a sum of positive squares in 4 ways, for example, as 128164 + 12595401 = 358^2 + 3549^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12723565 - 2⁵ = 12723533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12723569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74760 + ... + 74929.

It is an arithmetic number, because the mean of its divisors is an integer number (2020815).

Almost surely, 2^12723565 is an apocalyptic number.

It is an amenable number.

12723565 is a deficient number, since it is larger than the sum of its proper divisors (3442955).

12723565 is a wasteful number, since it uses less digits than its factorization.

12723565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149711.

The product of its digits is 12600, while the sum is 31.

The square root of 12723565 is about 3567.0106531941. The cubic root of 12723565 is about 233.4548697908.

The spelling of 12723565 in words is "twelve million, seven hundred twenty-three thousand, five hundred sixty-five".