342506 has 4 divisors (see below), whose sum is σ = 513762. Its totient is φ = 171252.

The previous prime is 342497. The next prime is 342521. The reversal of 342506 is 605243.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 605243 = 73 ⋅8291.

It can be written as a sum of positive squares in only one way, i.e., 330625 + 11881 = 575^2 + 109^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 342506.

It is an unprimeable 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 as a sum of consecutive naturals, namely, 85625 + ... + 85628.

2³⁴²⁵⁰⁶ is an apocalyptic number.

342506 is a deficient number, since it is larger than the sum of its proper divisors (171256).

342506 is a wasteful number, since it uses less digits than its factorization.

342506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171255.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 342506 is about 585.2401216595. The cubic root of 342506 is about 69.9663784117.

Adding to 342506 its reverse (605243), we get a palindrome (947749).

It can be divided in two parts, 342 and 506, that added together give a palindrome (848).

The spelling of 342506 in words is "three hundred forty-two thousand, five hundred six".