842345 has 16 divisors (see below), whose sum is σ = 1185408. Its totient is φ = 562560.

The previous prime is 842341. The next prime is 842351. The reversal of 842345 is 543248.

It is not a de Polignac number, because 842345 - 2² = 842341 is a prime.

Its product of digits (3840) is a multiple of the sum of its prime divisors (640).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (842341) 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 15 ways as a sum of consecutive naturals, for example, 1142 + ... + 1728.

It is an arithmetic number, because the mean of its divisors is an integer number (74088).

2⁸⁴²³⁴⁵ is an apocalyptic number.

It is an amenable number.

842345 is a deficient number, since it is larger than the sum of its proper divisors (343063).

842345 is a wasteful number, since it uses less digits than its factorization.

842345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640.

The product of its digits is 3840, while the sum is 26.

The square root of 842345 is about 917.7935497703. The cubic root of 842345 is about 94.4415995555.

The spelling of 842345 in words is "eight hundred forty-two thousand, three hundred forty-five".