340605 has 30 divisors (see below), whose sum is σ = 632346. Its totient is φ = 175392.

The previous prime is 340601. The next prime is 340619. The reversal of 340605 is 506043.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 39204 + 301401 = 198^2 + 549^2 .

It is not a de Polignac number, because 340605 - 2² = 340601 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 340605.

It is not an unprimeable number, because it can be changed into a prime (340601) by changing a digit.

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 in 29 ways as a sum of consecutive naturals, for example, 11731 + ... + 11759.

2³⁴⁰⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

340605 is a deficient number, since it is larger than the sum of its proper divisors (291741).

340605 is an equidigital number, since it uses as much as digits as its factorization.

340605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75 (or 37 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 340605 is about 583.6137421274. The cubic root of 340605 is about 69.8366941433.

Adding to 340605 its reverse (506043), we get a palindrome (846648).

The spelling of 340605 in words is "three hundred forty thousand, six hundred five".