12745559 has 4 divisors (see below), whose sum is σ = 12756216. Its totient is φ = 12734904.

The previous prime is 12745549. The next prime is 12745567. The reversal of 12745559 is 95554721.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12745559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12745549) 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, 3269 + ... + 6014.

It is an arithmetic number, because the mean of its divisors is an integer number (3189054).

Almost surely, 2^12745559 is an apocalyptic number.

12745559 is a deficient number, since it is larger than the sum of its proper divisors (10657).

12745559 is an equidigital number, since it uses as much as digits as its factorization.

12745559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10656.

The product of its digits is 63000, while the sum is 38.

The square root of 12745559 is about 3570.0922957257. The cubic root of 12745559 is about 233.5893093308.

The spelling of 12745559 in words is "twelve million, seven hundred forty-five thousand, five hundred fifty-nine".