842017851 has 24 divisors (see below), whose sum is σ = 1301976000. Its totient is φ = 522780912.

The previous prime is 842017829. The next prime is 842017853. The reversal of 842017851 is 158710248.

It is not a de Polignac number, because 842017851 - 2²⁵ = 808463419 is a prime.

It is a super-2 number, since 2×842017851² = 1417988122805316402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (842017853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31641 + ... + 51818.

It is an arithmetic number, because the mean of its divisors is an integer number (54249000).

Almost surely, 2^842017851 is an apocalyptic number.

842017851 is a deficient number, since it is larger than the sum of its proper divisors (459958149).

842017851 is a wasteful number, since it uses less digits than its factorization.

842017851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83543 (or 83540 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 842017851 is about 29017.5438485065. The cubic root of 842017851 is about 944.2937159837.

The spelling of 842017851 in words is "eight hundred forty-two million, seventeen thousand, eight hundred fifty-one".