12520542421415 has 16 divisors (see below), whose sum is σ = 17171365670208. Its totient is φ = 8585346771456.

The previous prime is 12520542421357. The next prime is 12520542421441. The reversal of 12520542421415 is 51412424502521.

It is not a de Polignac number, because 12520542421415 - 2⁸ = 12520542421159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1673372 + ... + 5276481.

It is an arithmetic number, because the mean of its divisors is an integer number (1073210354388).

Almost surely, 2^{12520542421415} is an apocalyptic number.

12520542421415 is a deficient number, since it is larger than the sum of its proper divisors (4650823248793).

12520542421415 is an equidigital number, since it uses as much as digits as its factorization.

12520542421415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7001338.

The product of its (nonzero) digits is 128000, while the sum is 38.

Adding to 12520542421415 its reverse (51412424502521), we get a palindrome (63932966923936).

The spelling of 12520542421415 in words is "twelve trillion, five hundred twenty billion, five hundred forty-two million, four hundred twenty-one thousand, four hundred fifteen".