12545765 has 8 divisors (see below), whose sum is σ = 15122040. Its totient is φ = 9991872.

The previous prime is 12545759. The next prime is 12545773. The reversal of 12545765 is 56754521.

It is a Cunningham number, because it is equal to 3542²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 4519876 + 8025889 = 2126^2 + 2833^2 .

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 12545765 - 2⁴ = 12545749 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4334 + ... + 6623.

It is an arithmetic number, because the mean of its divisors is an integer number (1890255).

Almost surely, 2^12545765 is an apocalyptic number.

It is an amenable number.

12545765 is a deficient number, since it is larger than the sum of its proper divisors (2576275).

12545765 is a wasteful number, since it uses less digits than its factorization.

12545765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11191.

The product of its digits is 42000, while the sum is 35.

The square root of 12545765 is about 3542.0001411632. Note that the first 3 decimals coincide. The cubic root of 12545765 is about 232.3623264790.

The spelling of 12545765 in words is "twelve million, five hundred forty-five thousand, seven hundred sixty-five".