842775 has 24 divisors (see below), whose sum is σ = 1477584. Its totient is φ = 422400.

The previous prime is 842771. The next prime is 842791. The reversal of 842775 is 577248.

It is not a de Polignac number, because 842775 - 2² = 842771 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842771) 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 23 ways as a sum of consecutive naturals, for example, 945 + ... + 1605.

It is an arithmetic number, because the mean of its divisors is an integer number (61566).

2⁸⁴²⁷⁷⁵ is an apocalyptic number.

842775 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

842775 is a deficient number, since it is larger than the sum of its proper divisors (634809).

842775 is a wasteful number, since it uses less digits than its factorization.

842775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691 (or 686 counting only the distinct ones).

The product of its digits is 15680, while the sum is 33.

The square root of 842775 is about 918.0277773575. The cubic root of 842775 is about 94.4576669940.

It can be divided in two parts, 8427 and 75, that multiplied together give a square (632025 = 795²).

The spelling of 842775 in words is "eight hundred forty-two thousand, seven hundred seventy-five".