1285315108387 has 4 divisors (see below), whose sum is σ = 1285317382320. Its totient is φ = 1285312834456.

The previous prime is 1285315108379. The next prime is 1285315108391. The reversal of 1285315108387 is 7838015135821.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1285315108387 - 2³ = 1285315108379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1285315148387) 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, 439653 + ... + 1662505.

It is an arithmetic number, because the mean of its divisors is an integer number (321329345580).

Almost surely, 2^{1285315108387} is an apocalyptic number.

1285315108387 is a deficient number, since it is larger than the sum of its proper divisors (2273933).

1285315108387 is a wasteful number, since it uses less digits than its factorization.

1285315108387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273932.

The product of its (nonzero) digits is 1612800, while the sum is 52.

The spelling of 1285315108387 in words is "one trillion, two hundred eighty-five billion, three hundred fifteen million, one hundred eight thousand, three hundred eighty-seven".