12595086421 has 4 divisors (see below), whose sum is σ = 12596150700. Its totient is φ = 12594022144.

The previous prime is 12595086401. The next prime is 12595086433. The reversal of 12595086421 is 12468059521.

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 3008522500 + 9586563921 = 54850^2 + 97911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12595086421 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 (12595086401) 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 3 ways as a sum of consecutive naturals, for example, 514186 + ... + 538123.

It is an arithmetic number, because the mean of its divisors is an integer number (3149037675).

Almost surely, 2^12595086421 is an apocalyptic number.

It is an amenable number.

12595086421 is a deficient number, since it is larger than the sum of its proper divisors (1064279).

12595086421 is a wasteful number, since it uses less digits than its factorization.

12595086421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064278.

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 12595086421 in words is "twelve billion, five hundred ninety-five million, eighty-six thousand, four hundred twenty-one".