1143212871 has 16 divisors (see below), whose sum is σ = 1549532160. Its totient is φ = 749592480.

The previous prime is 1143212849. The next prime is 1143212879. The reversal of 1143212871 is 1782123411.

It is not a de Polignac number, because 1143212871 - 2⁹ = 1143212359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143212879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53161 + ... + 71501.

It is an arithmetic number, because the mean of its divisors is an integer number (96845760).

Almost surely, 2^1143212871 is an apocalyptic number.

1143212871 is a deficient number, since it is larger than the sum of its proper divisors (406319289).

1143212871 is a wasteful number, since it uses less digits than its factorization.

1143212871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18686.

The product of its digits is 2688, while the sum is 30.

The square root of 1143212871 is about 33811.4310699799. The cubic root of 1143212871 is about 1045.6243823985.

The spelling of 1143212871 in words is "one billion, one hundred forty-three million, two hundred twelve thousand, eight hundred seventy-one".