342909 has 12 divisors (see below), whose sum is σ = 566176. Its totient is φ = 195912.

The previous prime is 342899. The next prime is 342929. The reversal of 342909 is 909243.

It is not a de Polignac number, because 342909 - 2⁸ = 342653 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

342909 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 342909.

It is not an unprimeable number, because it can be changed into a prime (342929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2659 + ... + 2784.

2³⁴²⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

342909 is a deficient number, since it is larger than the sum of its proper divisors (223267).

342909 is a wasteful number, since it uses less digits than its factorization.

342909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5456 (or 5453 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 342909 is about 585.5843235607. The cubic root of 342909 is about 69.9938089763.

The spelling of 342909 in words is "three hundred forty-two thousand, nine hundred nine".