209042 has 8 divisors (see below), whose sum is σ = 316416. Its totient is φ = 103572.

The previous prime is 209039. The next prime is 209063. The reversal of 209042 is 240902.

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

It is a self number, because there is not a number n which added to its sum of digits gives 209042.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158 + ... + 665.

It is an arithmetic number, because the mean of its divisors is an integer number (39552).

2²⁰⁹⁰⁴² is an apocalyptic number.

209042 is a deficient number, since it is larger than the sum of its proper divisors (107374).

209042 is a wasteful number, since it uses less digits than its factorization.

209042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 209042 is about 457.2111109761. The cubic root of 209042 is about 59.3486963822.

Adding to 209042 its reverse (240902), we get a palindrome (449944).

The spelling of 209042 in words is "two hundred nine thousand, forty-two".