345539 has 4 divisors (see below), whose sum is σ = 347256. Its totient is φ = 343824.

The previous prime is 345533. The next prime is 345547. The reversal of 345539 is 935543.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 935543 = 7 ⋅133649.

It is a cyclic number.

It is not a de Polignac number, because 345539 - 2¹² = 341443 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 345539.

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 3 ways as a sum of consecutive naturals, for example, 509 + ... + 974.

It is an arithmetic number, because the mean of its divisors is an integer number (86814).

2³⁴⁵⁵³⁹ is an apocalyptic number.

345539 is a deficient number, since it is larger than the sum of its proper divisors (1717).

345539 is a wasteful number, since it uses less digits than its factorization.

345539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1716.

The product of its digits is 8100, while the sum is 29.

The square root of 345539 is about 587.8256544248. The cubic root of 345539 is about 70.1722966528.

The spelling of 345539 in words is "three hundred forty-five thousand, five hundred thirty-nine".