340005 has 16 divisors (see below), whose sum is σ = 573120. Its totient is φ = 171648.

The previous prime is 339991. The next prime is 340007. The reversal of 340005 is 500043.

It is not a de Polignac number, because 340005 - 2⁸ = 339749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312 + ... + 881.

It is an arithmetic number, because the mean of its divisors is an integer number (35820).

2³⁴⁰⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

340005 is a deficient number, since it is larger than the sum of its proper divisors (233115).

340005 is a wasteful number, since it uses less digits than its factorization.

340005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220.

The product of its (nonzero) digits is 60, while the sum is 12.

The square root of 340005 is about 583.0994769334. The cubic root of 340005 is about 69.7956626013.

Adding to 340005 its reverse (500043), we get a palindrome (840048).

The spelling of 340005 in words is "three hundred forty thousand, five".