12451520505243 has 4 divisors (see below), whose sum is σ = 16602027340328. Its totient is φ = 8301013670160.

The previous prime is 12451520505167. The next prime is 12451520505283. The reversal of 12451520505243 is 34250502515421.

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

It is not a de Polignac number, because 12451520505243 - 2¹⁴ = 12451520488859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12451520505283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2075253417538 + ... + 2075253417543.

It is an arithmetic number, because the mean of its divisors is an integer number (4150506835082).

Almost surely, 2^{12451520505243} is an apocalyptic number.

12451520505243 is a deficient number, since it is larger than the sum of its proper divisors (4150506835085).

12451520505243 is an equidigital number, since it uses as much as digits as its factorization.

12451520505243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4150506835084.

The product of its (nonzero) digits is 240000, while the sum is 39.

The spelling of 12451520505243 in words is "twelve trillion, four hundred fifty-one billion, five hundred twenty million, five hundred five thousand, two hundred forty-three".