12765617 has 4 divisors (see below), whose sum is σ = 12806976. Its totient is φ = 12724260.

The previous prime is 12765611. The next prime is 12765619. The reversal of 12765617 is 71656721.

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.

It is a cyclic number.

It is not a de Polignac number, because 12765617 - 2⁴ = 12765601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12765611) 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 3 ways as a sum of consecutive naturals, for example, 20213 + ... + 20834.

It is an arithmetic number, because the mean of its divisors is an integer number (3201744).

Almost surely, 2^12765617 is an apocalyptic number.

It is an amenable number.

12765617 is a deficient number, since it is larger than the sum of its proper divisors (41359).

12765617 is an equidigital number, since it uses as much as digits as its factorization.

12765617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41358.

The product of its digits is 17640, while the sum is 35.

The square root of 12765617 is about 3572.9003624507. The cubic root of 12765617 is about 233.7117801905.

The spelling of 12765617 in words is "twelve million, seven hundred sixty-five thousand, six hundred seventeen".