345021 has 8 divisors (see below), whose sum is σ = 484320. Its totient is φ = 217872.

The previous prime is 345019. The next prime is 345041. The reversal of 345021 is 120543.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 345021 - 2¹ = 345019 is a prime.

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 345021.

It is not an unprimeable number, because it can be changed into a prime (345001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2970 + ... + 3083.

It is an arithmetic number, because the mean of its divisors is an integer number (60540).

2³⁴⁵⁰²¹ is an apocalyptic number.

It is an amenable number.

345021 is a deficient number, since it is larger than the sum of its proper divisors (139299).

345021 is a wasteful number, since it uses less digits than its factorization.

345021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6075.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 345021 is about 587.3848823387. The cubic root of 345021 is about 70.1372138512.

Adding to 345021 its reverse (120543), we get a palindrome (465564).

The spelling of 345021 in words is "three hundred forty-five thousand, twenty-one".