1285868871 has 64 divisors (see below), whose sum is σ = 2365849600. Its totient is φ = 673596000.

The previous prime is 1285868863. The next prime is 1285868873. The reversal of 1285868871 is 1788685821.

It is not a de Polignac number, because 1285868871 - 2³ = 1285868863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285868873) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 105546 + ... + 117096.

It is an arithmetic number, because the mean of its divisors is an integer number (36966400).

Almost surely, 2^1285868871 is an apocalyptic number.

1285868871 is a deficient number, since it is larger than the sum of its proper divisors (1079980729).

1285868871 is a wasteful number, since it uses less digits than its factorization.

1285868871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11617 (or 11611 counting only the distinct ones).

The product of its digits is 1720320, while the sum is 54.

The square root of 1285868871 is about 35859.0138040633. The cubic root of 1285868871 is about 1087.4239509246.

The spelling of 1285868871 in words is "one billion, two hundred eighty-five million, eight hundred sixty-eight thousand, eight hundred seventy-one".