340842 has 8 divisors (see below), whose sum is σ = 681696. Its totient is φ = 113612.

The previous prime is 340819. The next prime is 340849. The reversal of 340842 is 248043.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

340842 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (340849) by changing a digit.

340842 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28398 + ... + 28409.

It is an arithmetic number, because the mean of its divisors is an integer number (85212).

2³⁴⁰⁸⁴² is an apocalyptic number.

340842 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

340842 is a wasteful number, since it uses less digits than its factorization.

340842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56812.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 340842 is about 583.8167520721. The cubic root of 340842 is about 69.8528883263.

Adding to 340842 its reverse (248043), we get a palindrome (588885).

The spelling of 340842 in words is "three hundred forty thousand, eight hundred forty-two".