842287281 has 16 divisors (see below), whose sum is σ = 1267392960. Its totient is φ = 492873920.

The previous prime is 842287261. The next prime is 842287297. The reversal of 842287281 is 182782248.

It is not a de Polignac number, because 842287281 - 2⁵ = 842287249 is a prime.

It is a super-2 number, since 2×842287281² = 1418895727468745922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (842287261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 439110 + ... + 441023.

It is an arithmetic number, because the mean of its divisors is an integer number (79212060).

Almost surely, 2^842287281 is an apocalyptic number.

It is an amenable number.

842287281 is a deficient number, since it is larger than the sum of its proper divisors (425105679).

842287281 is a wasteful number, since it uses less digits than its factorization.

842287281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880176.

The product of its digits is 114688, while the sum is 42.

The square root of 842287281 is about 29022.1860134622. The cubic root of 842287281 is about 944.3944240324.

It can be divided in two parts, 8422 and 87281, that added together give a triangular number (95703 = T₄₃₇).

The spelling of 842287281 in words is "eight hundred forty-two million, two hundred eighty-seven thousand, two hundred eighty-one".