345545 has 4 divisors (see below), whose sum is σ = 414660. Its totient is φ = 276432.

The previous prime is 345533. The next prime is 345547. The reversal of 345545 is 545543.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 163216 + 182329 = 404^2 + 427^2 .

It is a cyclic number.

It is not a de Polignac number, because 345545 - 2¹⁶ = 280009 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 345545.

It is not an unprimeable number, because it can be changed into a prime (345547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34550 + ... + 34559.

It is an arithmetic number, because the mean of its divisors is an integer number (103665).

2³⁴⁵⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

345545 is a deficient number, since it is larger than the sum of its proper divisors (69115).

345545 is an equidigital number, since it uses as much as digits as its factorization.

345545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69114.

The product of its digits is 6000, while the sum is 26.

The square root of 345545 is about 587.8307579567. The cubic root of 345545 is about 70.1727028118.

The spelling of 345545 in words is "three hundred forty-five thousand, five hundred forty-five".