2142785871 has 12 divisors (see below), whose sum is σ = 3095704560. Its totient is φ = 1428261120.

The previous prime is 2142785867. The next prime is 2142785881. The reversal of 2142785871 is 1785872412.

2142785871 is a `hidden beast` number, since 21 + 42 + 7 + 8 + 587 + 1 = 666.

It is not a de Polignac number, because 2142785871 - 2² = 2142785867 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142785881) 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 11 ways as a sum of consecutive naturals, for example, 38511 + ... + 75951.

It is an arithmetic number, because the mean of its divisors is an integer number (257975380).

Almost surely, 2^2142785871 is an apocalyptic number.

2142785871 is a deficient number, since it is larger than the sum of its proper divisors (952918689).

2142785871 is a wasteful number, since it uses less digits than its factorization.

2142785871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43806 (or 43803 counting only the distinct ones).

The product of its digits is 250880, while the sum is 45.

The square root of 2142785871 is about 46290.2351581843. The cubic root of 2142785871 is about 1289.2176958596.

The spelling of 2142785871 in words is "two billion, one hundred forty-two million, seven hundred eighty-five thousand, eight hundred seventy-one".