1142785871 has 8 divisors (see below), whose sum is σ = 1167618240. Its totient is φ = 1117975168.

The previous prime is 1142785867. The next prime is 1142785877. The reversal of 1142785871 is 1785872411.

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 1142785871 - 2² = 1142785867 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142785877) 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, 147035 + ... + 154611.

It is an arithmetic number, because the mean of its divisors is an integer number (145952280).

Almost surely, 2^1142785871 is an apocalyptic number.

1142785871 is a deficient number, since it is larger than the sum of its proper divisors (24832369).

1142785871 is an equidigital number, since it uses as much as digits as its factorization.

1142785871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10833.

The product of its digits is 125440, while the sum is 44.

The square root of 1142785871 is about 33805.1160477227. The cubic root of 1142785871 is about 1045.4941829048.

The spelling of 1142785871 in words is "one billion, one hundred forty-two million, seven hundred eighty-five thousand, eight hundred seventy-one".