123605 has 8 divisors (see below), whose sum is σ = 151200. Its totient is φ = 96976.

The previous prime is 123601. The next prime is 123619. The reversal of 123605 is 506321.

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

It is a cyclic number.

It is not a de Polignac number, because 123605 - 2² = 123601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86 + ... + 504.

It is an arithmetic number, because the mean of its divisors is an integer number (18900).

2¹²³⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

123605 is a deficient number, since it is larger than the sum of its proper divisors (27595).

123605 is an equidigital number, since it uses as much as digits as its factorization.

123605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 123605 is about 351.5750275546. The cubic root of 123605 is about 49.8133037579.

Adding to 123605 its reverse (506321), we get a palindrome (629926).

The spelling of 123605 in words is "one hundred twenty-three thousand, six hundred five".