345530 has 16 divisors (see below), whose sum is σ = 629640. Its totient is φ = 136512.

The previous prime is 345517. The next prime is 345533. The reversal of 345530 is 35543.

It can be written as a sum of positive squares in 4 ways, for example, as 223729 + 121801 = 473^2 + 349^2 .

It is not an unprimeable number, because it can be changed into a prime (345533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 932 + ... + 1248.

2³⁴⁵⁵³⁰ is an apocalyptic number.

345530 is a deficient number, since it is larger than the sum of its proper divisors (284110).

345530 is a wasteful number, since it uses less digits than its factorization.

345530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433.

The product of its (nonzero) digits is 900, while the sum is 20.

The square root of 345530 is about 587.8179990439. The cubic root of 345530 is about 70.1716874055.

The spelling of 345530 in words is "three hundred forty-five thousand, five hundred thirty".