342405 has 24 divisors (see below), whose sum is σ = 678912. Its totient is φ = 156384.

The previous prime is 342389. The next prime is 342413. The reversal of 342405 is 504243.

It is a happy number.

It is not a de Polignac number, because 342405 - 2⁴ = 342389 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 342405.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 229 + ... + 858.

It is an arithmetic number, because the mean of its divisors is an integer number (28288).

2³⁴²⁴⁰⁵ is an apocalyptic number.

342405 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

342405 is a deficient number, since it is larger than the sum of its proper divisors (336507).

342405 is a wasteful number, since it uses less digits than its factorization.

342405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105 (or 1102 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 342405 is about 585.1538259296. The cubic root of 342405 is about 69.9595003823.

Adding to 342405 its reverse (504243), we get a palindrome (846648).

It can be divided in two parts, 342 and 405, that added together give a palindrome (747).

The spelling of 342405 in words is "three hundred forty-two thousand, four hundred five".