123055 has 4 divisors (see below), whose sum is σ = 147672. Its totient is φ = 98440.

The previous prime is 123049. The next prime is 123059. The reversal of 123055 is 550321.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 123055 - 2¹¹ = 121007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123059) 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, 12301 + ... + 12310.

It is an arithmetic number, because the mean of its divisors is an integer number (36918).

2¹²³⁰⁵⁵ is an apocalyptic number.

123055 is a deficient number, since it is larger than the sum of its proper divisors (24617).

123055 is an equidigital number, since it uses as much as digits as its factorization.

123055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24616.

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 123055 is about 350.7919611394. The cubic root of 123055 is about 49.7393098417.

Adding to 123055 its reverse (550321), we get a palindrome (673376).

The spelling of 123055 in words is "one hundred twenty-three thousand, fifty-five".