123195 has 16 divisors (see below), whose sum is σ = 202752. Its totient is φ = 63840.

The previous prime is 123191. The next prime is 123203. The reversal of 123195 is 591321.

It is not a de Polignac number, because 123195 - 2² = 123191 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 550 + ... + 740.

It is an arithmetic number, because the mean of its divisors is an integer number (12672).

2¹²³¹⁹⁵ is an apocalyptic number.

123195 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123195 is a deficient number, since it is larger than the sum of its proper divisors (79557).

123195 is a wasteful number, since it uses less digits than its factorization.

123195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242.

The product of its digits is 270, while the sum is 21.

The square root of 123195 is about 350.9914528874. The cubic root of 123195 is about 49.7581655410.

It can be divided in two parts, 1231 and 95, that added together give a triangular number (1326 = T₅₁).

The spelling of 123195 in words is "one hundred twenty-three thousand, one hundred ninety-five".