342123 has 4 divisors (see below), whose sum is σ = 456168. Its totient is φ = 228080.

The previous prime is 342107. The next prime is 342131. The reversal of 342123 is 321243.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 342123 - 2⁴ = 342107 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (342143) 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, 57018 + ... + 57023.

It is an arithmetic number, because the mean of its divisors is an integer number (114042).

2³⁴²¹²³ is an apocalyptic number.

342123 is a deficient number, since it is larger than the sum of its proper divisors (114045).

342123 is a wasteful number, since it uses less digits than its factorization.

342123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114044.

The product of its digits is 144, while the sum is 15.

The square root of 342123 is about 584.9128140159. The cubic root of 342123 is about 69.9402892166.

Adding to 342123 its reverse (321243), we get a palindrome (663366).

It can be divided in two parts, 342 and 123, that added together give a triangular number (465 = T₃₀).

The spelling of 342123 in words is "three hundred forty-two thousand, one hundred twenty-three", and thus it is an iban number.