842787 has 12 divisors (see below), whose sum is σ = 1328184. Its totient is φ = 510720.

The previous prime is 842771. The next prime is 842791. The reversal of 842787 is 787248.

842787 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 842787 - 2⁴ = 842771 is a prime.

842787 is a lucky number.

It is a plaindrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 842787.

It is not an unprimeable number, because it can be changed into a prime (842747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4158 + ... + 4355.

It is an arithmetic number, because the mean of its divisors is an integer number (110682).

2⁸⁴²⁷⁸⁷ is an apocalyptic number.

842787 is a deficient number, since it is larger than the sum of its proper divisors (485397).

842787 is a wasteful number, since it uses less digits than its factorization.

842787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8530 (or 8527 counting only the distinct ones).

The product of its digits is 25088, while the sum is 36.

The square root of 842787 is about 918.0343130842. The cubic root of 842787 is about 94.4581153093.

The spelling of 842787 in words is "eight hundred forty-two thousand, seven hundred eighty-seven".