345506 has 32 divisors (see below), whose sum is σ = 656640. Its totient is φ = 133056.

The previous prime is 345487. The next prime is 345511. The reversal of 345506 is 605543.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a zygodrome in base 6.

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 345506.

It is an unprimeable number.

345506 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9320 + ... + 9356.

It is an arithmetic number, because the mean of its divisors is an integer number (20520).

2³⁴⁵⁵⁰⁶ is an apocalyptic number.

345506 is a deficient number, since it is larger than the sum of its proper divisors (311134).

345506 is a wasteful number, since it uses less digits than its factorization.

345506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 345506 is about 587.7975842074. The cubic root of 345506 is about 70.1700626942.

The spelling of 345506 in words is "three hundred forty-five thousand, five hundred six".