13240961285 has 4 divisors (see below), whose sum is σ = 15889153548. Its totient is φ = 10592769024.

The previous prime is 13240961257. The next prime is 13240961291. The reversal of 13240961285 is 58216904231.

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 7936315396 + 5304645889 = 89086^2 + 72833^2 .

It is a cyclic number.

It is not a de Polignac number, because 13240961285 - 2¹⁴ = 13240944901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1324096124 + ... + 1324096133.

It is an arithmetic number, because the mean of its divisors is an integer number (3972288387).

Almost surely, 2^13240961285 is an apocalyptic number.

It is an amenable number.

13240961285 is a deficient number, since it is larger than the sum of its proper divisors (2648192263).

13240961285 is an equidigital number, since it uses as much as digits as its factorization.

13240961285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2648192262.

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 13240961285 in words is "thirteen billion, two hundred forty million, nine hundred sixty-one thousand, two hundred eighty-five".