123845 has 16 divisors (see below), whose sum is σ = 165888. Its totient is φ = 88320.

The previous prime is 123833. The next prime is 123853. The reversal of 123845 is 548321.

It is not a de Polignac number, because 123845 - 2⁴ = 123829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 123845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2612 + ... + 2658.

It is an arithmetic number, because the mean of its divisors is an integer number (10368).

2¹²³⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

123845 is a deficient number, since it is larger than the sum of its proper divisors (42043).

123845 is a wasteful number, since it uses less digits than its factorization.

123845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100.

The product of its digits is 960, while the sum is 23.

The square root of 123845 is about 351.9161832028. The cubic root of 123845 is about 49.8455232301.

The spelling of 123845 in words is "one hundred twenty-three thousand, eight hundred forty-five".