209342 has 16 divisors (see below), whose sum is σ = 378240. Its totient is φ = 84888.

The previous prime is 209333. The next prime is 209347. The reversal of 209342 is 243902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209347) by changing a digit.

209342 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 128 + ... + 659.

It is an arithmetic number, because the mean of its divisors is an integer number (23640).

2²⁰⁹³⁴² is an apocalyptic number.

209342 is a deficient number, since it is larger than the sum of its proper divisors (168898).

209342 is a wasteful number, since it uses less digits than its factorization.

209342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 209342 is about 457.5390693700. The cubic root of 209342 is about 59.3770736118.

The spelling of 209342 in words is "two hundred nine thousand, three hundred forty-two".