12560280397 has 6 divisors (see below), whose sum is σ = 14610938478. Its totient is φ = 10765954584.

The previous prime is 12560280379. The next prime is 12560280401. The reversal of 12560280397 is 79308206521.

It can be written as a sum of positive squares in only one way, i.e., 12088782601 + 471497796 = 109949^2 + 21714^2 .

It is not a de Polignac number, because 12560280397 - 2¹⁹ = 12559756109 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 (12560280367) 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 5 ways as a sum of consecutive naturals, for example, 128166078 + ... + 128166175.

It is an arithmetic number, because the mean of its divisors is an integer number (2435156413).

Almost surely, 2^12560280397 is an apocalyptic number.

It is an amenable number.

12560280397 is a deficient number, since it is larger than the sum of its proper divisors (2050658081).

12560280397 is an equidigital number, since it uses as much as digits as its factorization.

12560280397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256332267 (or 256332260 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 12560280397 in words is "twelve billion, five hundred sixty million, two hundred eighty thousand, three hundred ninety-seven".