1287535810313 has 8 divisors (see below), whose sum is σ = 1292359725000. Its totient is φ = 1282712174208.

The previous prime is 1287535810307. The next prime is 1287535810333. The reversal of 1287535810313 is 3130185357821.

It can be written as a sum of positive squares in 4 ways, for example, as 198178109584 + 1089357700729 = 445172^2 + 1043723^2 .

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 1287535810313 - 2²⁸ = 1287267374857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1287535810333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16847813 + ... + 16924061.

It is an arithmetic number, because the mean of its divisors is an integer number (161544965625).

Almost surely, 2^{1287535810313} is an apocalyptic number.

It is an amenable number.

1287535810313 is a deficient number, since it is larger than the sum of its proper divisors (4823914687).

1287535810313 is an equidigital number, since it uses as much as digits as its factorization.

1287535810313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139291.

The product of its (nonzero) digits is 604800, while the sum is 47.

The spelling of 1287535810313 in words is "one trillion, two hundred eighty-seven billion, five hundred thirty-five million, eight hundred ten thousand, three hundred thirteen".