12520075391 has 8 divisors (see below), whose sum is σ = 13273197840. Its totient is φ = 11768802688.

The previous prime is 12520075387. The next prime is 12520075409. The reversal of 12520075391 is 19357002521.

12520075391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12520075391 - 2² = 12520075387 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 (12520075991) 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 7 ways as a sum of consecutive naturals, for example, 448481 + ... + 475578.

It is an arithmetic number, because the mean of its divisors is an integer number (1659149730).

Almost surely, 2^12520075391 is an apocalyptic number.

12520075391 is a deficient number, since it is larger than the sum of its proper divisors (753122449).

12520075391 is an equidigital number, since it uses as much as digits as its factorization.

12520075391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924873.

The product of its (nonzero) digits is 18900, while the sum is 35.

The spelling of 12520075391 in words is "twelve billion, five hundred twenty million, seventy-five thousand, three hundred ninety-one".