842385 has 16 divisors (see below), whose sum is σ = 1365120. Its totient is φ = 443520.

The previous prime is 842383. The next prime is 842393. The reversal of 842385 is 583248.

842385 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 842385 - 2¹ = 842383 is a prime.

It is a super-2 number, since 2×842385² = 1419224976450, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 842385.

It is not an unprimeable number, because it can be changed into a prime (842383) 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, 1020 + ... + 1650.

It is an arithmetic number, because the mean of its divisors is an integer number (85320).

2⁸⁴²³⁸⁵ is an apocalyptic number.

It is an amenable number.

842385 is a deficient number, since it is larger than the sum of its proper divisors (522735).

842385 is a wasteful number, since it uses less digits than its factorization.

842385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728.

The product of its digits is 7680, while the sum is 30.

The square root of 842385 is about 917.8153409047. The cubic root of 842385 is about 94.4430944316.

The spelling of 842385 in words is "eight hundred forty-two thousand, three hundred eighty-five".