345123 has 12 divisors (see below), whose sum is σ = 515008. Its totient is φ = 222480.

The previous prime is 345109. The next prime is 345133. The reversal of 345123 is 321543.

345123 is nontrivially palindromic in base 13.

It is not a de Polignac number, because 345123 - 2⁹ = 344611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 345096 and 345105.

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 11 ways as a sum of consecutive naturals, for example, 340 + ... + 897.

2³⁴⁵¹²³ is an apocalyptic number.

345123 is a deficient number, since it is larger than the sum of its proper divisors (169885).

345123 is a wasteful number, since it uses less digits than its factorization.

345123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274 (or 1271 counting only the distinct ones).

The product of its digits is 360, while the sum is 18.

The square root of 345123 is about 587.4717014461. The cubic root of 345123 is about 70.1441248227.

Adding to 345123 its reverse (321543), we get a palindrome (666666).

The spelling of 345123 in words is "three hundred forty-five thousand, one hundred twenty-three".