345405 has 8 divisors (see below), whose sum is σ = 552672. Its totient is φ = 184208.

The previous prime is 345379. The next prime is 345413. The reversal of 345405 is 504543.

It is a happy number.

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 345405 - 2⁹ = 344893 is a prime.

It is a super-2 number, since 2×345405² = 238609228050, which contains 22 as substring.

345405 is a modest number, since divided by 405 gives 345 as remainder.

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 345405.

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, 11499 + ... + 11528.

It is an arithmetic number, because the mean of its divisors is an integer number (69084).

2³⁴⁵⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

345405 is a deficient number, since it is larger than the sum of its proper divisors (207267).

345405 is a wasteful number, since it uses less digits than its factorization.

345405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23035.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 345405 is about 587.7116639986. The cubic root of 345405 is about 70.1632245428.

Adding to 345405 its reverse (504543), we get a palindrome (849948).

The spelling of 345405 in words is "three hundred forty-five thousand, four hundred five".