123385 has 4 divisors (see below), whose sum is σ = 148068. Its totient is φ = 98704.

The previous prime is 123379. The next prime is 123397. The reversal of 123385 is 583321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 583321 = 17 ⋅34313.

It can be written as a sum of positive squares in 2 ways, for example, as 76729 + 46656 = 277^2 + 216^2 .

It is a cyclic number.

It is not a de Polignac number, because 123385 - 2³ = 123377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 12334 + ... + 12343.

It is an arithmetic number, because the mean of its divisors is an integer number (37017).

2¹²³³⁸⁵ is an apocalyptic number.

It is an amenable number.

123385 is a deficient number, since it is larger than the sum of its proper divisors (24683).

123385 is an equidigital number, since it uses as much as digits as its factorization.

123385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24682.

The product of its digits is 720, while the sum is 22.

The square root of 123385 is about 351.2620104708. The cubic root of 123385 is about 49.7837325834.

The spelling of 123385 in words is "one hundred twenty-three thousand, three hundred eighty-five".