12541540439 has 4 divisors (see below), whose sum is σ = 12541847256. Its totient is φ = 12541233624.

The previous prime is 12541540421. The next prime is 12541540469. The reversal of 12541540439 is 93404514521.

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 12541540439 - 2¹⁶ = 12541474903 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 (12541540469) 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, 80564 + ... + 177689.

It is an arithmetic number, because the mean of its divisors is an integer number (3135461814).

Almost surely, 2^12541540439 is an apocalyptic number.

12541540439 is a deficient number, since it is larger than the sum of its proper divisors (306817).

12541540439 is an equidigital number, since it uses as much as digits as its factorization.

12541540439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306816.

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 12541540439 in words is "twelve billion, five hundred forty-one million, five hundred forty thousand, four hundred thirty-nine".