842871129 has 4 divisors (see below), whose sum is σ = 1123828176. Its totient is φ = 561914084.

The previous prime is 842871061. The next prime is 842871131. The reversal of 842871129 is 921178248.

842871129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 842871129 - 2⁹ = 842870617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (842871199) 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, 140478519 + ... + 140478524.

It is an arithmetic number, because the mean of its divisors is an integer number (280957044).

Almost surely, 2^842871129 is an apocalyptic number.

It is an amenable number.

842871129 is a deficient number, since it is larger than the sum of its proper divisors (280957047).

842871129 is a wasteful number, since it uses less digits than its factorization.

842871129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280957046.

The product of its digits is 64512, while the sum is 42.

The square root of 842871129 is about 29032.2429205874. The cubic root of 842871129 is about 944.6125821583.

The spelling of 842871129 in words is "eight hundred forty-two million, eight hundred seventy-one thousand, one hundred twenty-nine".