345138 has 32 divisors (see below), whose sum is σ = 749952. Its totient is φ = 105600.

The previous prime is 345133. The next prime is 345139. The reversal of 345138 is 831543.

It is a super-3 number, since 3×345138³ = 123338763189504216, which contains 333 as substring.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (345133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5628 + ... + 5688.

It is an arithmetic number, because the mean of its divisors is an integer number (23436).

2³⁴⁵¹³⁸ is an apocalyptic number.

345138 is an abundant number, since it is smaller than the sum of its proper divisors (404814).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

345138 is a wasteful number, since it uses less digits than its factorization.

345138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130.

The product of its digits is 1440, while the sum is 24.

The square root of 345138 is about 587.4844678798. The cubic root of 345138 is about 70.1451410272.

The spelling of 345138 in words is "three hundred forty-five thousand, one hundred thirty-eight".