12545520241 has 4 divisors (see below), whose sum is σ = 13205810800. Its totient is φ = 11885229684.

The previous prime is 12545520133. The next prime is 12545520289. The reversal of 12545520241 is 14202554521.

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, and also an emirpimes, since its reverse is a distinct semiprime: 14202554521 = 1481 ⋅9589841.

It is a cyclic number.

It is not a de Polignac number, because 12545520241 - 2³³ = 3955585649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12545520641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330145251 + ... + 330145288.

It is an arithmetic number, because the mean of its divisors is an integer number (3301452700).

Almost surely, 2^12545520241 is an apocalyptic number.

It is an amenable number.

12545520241 is a deficient number, since it is larger than the sum of its proper divisors (660290559).

12545520241 is an equidigital number, since it uses as much as digits as its factorization.

12545520241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660290558.

The product of its (nonzero) digits is 16000, while the sum is 31.

The spelling of 12545520241 in words is "twelve billion, five hundred forty-five million, five hundred twenty thousand, two hundred forty-one".