343405 has 8 divisors (see below), whose sum is σ = 415512. Its totient is φ = 272448.

The previous prime is 343393. The next prime is 343411. The reversal of 343405 is 504343.

It can be written as a sum of positive squares in 4 ways, for example, as 125316 + 218089 = 354^2 + 467^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 343405 - 2⁵ = 343373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 667 + ... + 1063.

It is an arithmetic number, because the mean of its divisors is an integer number (51939).

2³⁴³⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

343405 is a deficient number, since it is larger than the sum of its proper divisors (72107).

343405 is a wasteful number, since it uses less digits than its factorization.

343405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 343405 is about 586.0076791306. The cubic root of 343405 is about 70.0275401838.

Adding to 343405 its reverse (504343), we get a palindrome (847748).

The spelling of 343405 in words is "three hundred forty-three thousand, four hundred five".