12405898597 has 4 divisors (see below), whose sum is σ = 13135657356. Its totient is φ = 11676139840.

The previous prime is 12405898573. The next prime is 12405898639. The reversal of 12405898597 is 79589850421.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6297850881 + 6108047716 = 79359^2 + 78154^2 .

It is a cyclic number.

It is not a de Polignac number, because 12405898597 - 2⁷ = 12405898469 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12405898537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364879354 + ... + 364879387.

It is an arithmetic number, because the mean of its divisors is an integer number (3283914339).

Almost surely, 2^12405898597 is an apocalyptic number.

12405898597 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12405898597 is a deficient number, since it is larger than the sum of its proper divisors (729758759).

12405898597 is an equidigital number, since it uses as much as digits as its factorization.

12405898597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729758758.

The product of its (nonzero) digits is 7257600, while the sum is 58.

The spelling of 12405898597 in words is "twelve billion, four hundred five million, eight hundred ninety-eight thousand, five hundred ninety-seven".