206842 has 4 divisors (see below), whose sum is σ = 310266. Its totient is φ = 103420.

The previous prime is 206827. The next prime is 206879. The reversal of 206842 is 248602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 248602 = 2 ⋅124301.

It can be written as a sum of positive squares in only one way, i.e., 184041 + 22801 = 429^2 + 151^2 .

It is a super-2 number, since 2×206842² = 85567225928, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51709 + ... + 51712.

2²⁰⁶⁸⁴² is an apocalyptic number.

206842 is a deficient number, since it is larger than the sum of its proper divisors (103424).

206842 is a wasteful number, since it uses less digits than its factorization.

206842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103423.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 206842 is about 454.7988566388. The cubic root of 206842 is about 59.1397625041.

The spelling of 206842 in words is "two hundred six thousand, eight hundred forty-two".