342705 has 32 divisors (see below), whose sum is σ = 626688. Its totient is φ = 158400.

The previous prime is 342697. The next prime is 342733. The reversal of 342705 is 507243.

342705 = T₈₃ + T₈₄ + ... + T₁₃₇.

It is a happy number.

It is not a de Polignac number, because 342705 - 2³ = 342697 is a prime.

It is a d-powerful number, because it can be written as 3 + 4⁹ + 7⁴ + 2⁵ + 0 + 5⁷ .

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5082 + ... + 5148.

It is an arithmetic number, because the mean of its divisors is an integer number (19584).

2³⁴²⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

342705 is a deficient number, since it is larger than the sum of its proper divisors (283983).

342705 is a wasteful number, since it uses less digits than its factorization.

342705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 342705 is about 585.4101126561. The cubic root of 342705 is about 69.9799262168.

Adding to 342705 its reverse (507243), we get a palindrome (849948).

The spelling of 342705 in words is "three hundred forty-two thousand, seven hundred five".