342109 has 4 divisors (see below), whose sum is σ = 343516. Its totient is φ = 340704.

The previous prime is 342107. The next prime is 342131. The reversal of 342109 is 901243.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 901243 = 7 ⋅128749.

It can be written as a sum of positive squares in 2 ways, for example, as 164025 + 178084 = 405^2 + 422^2 .

It is a cyclic number.

It is not a de Polignac number, because 342109 - 2¹ = 342107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (342101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234 + ... + 859.

It is an arithmetic number, because the mean of its divisors is an integer number (85879).

2³⁴²¹⁰⁹ is an apocalyptic number.

342109 is the 313-rd nonagonal number.

It is an amenable number.

342109 is a deficient number, since it is larger than the sum of its proper divisors (1407).

342109 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 11 representation: 342109 = (214039)₁₁.

342109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 342109 is about 584.9008462979. The cubic root of 342109 is about 69.9393351957.

The spelling of 342109 in words is "three hundred forty-two thousand, one hundred nine".