12545239 has 4 divisors (see below), whose sum is σ = 14337424. Its totient is φ = 10753056.

The previous prime is 12545237. The next prime is 12545243. The reversal of 12545239 is 93254521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12545239 - 2¹ = 12545237 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12545239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12545233) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 896082 + ... + 896095.

It is an arithmetic number, because the mean of its divisors is an integer number (3584356).

Almost surely, 2^12545239 is an apocalyptic number.

12545239 is a deficient number, since it is larger than the sum of its proper divisors (1792185).

12545239 is an equidigital number, since it uses as much as digits as its factorization.

12545239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792184.

The product of its digits is 10800, while the sum is 31.

The square root of 12545239 is about 3541.9258885527. The cubic root of 12545239 is about 232.3590790540.

The spelling of 12545239 in words is "twelve million, five hundred forty-five thousand, two hundred thirty-nine".