123105195 has 12 divisors (see below), whose sum is σ = 213382416. Its totient is φ = 65656080.

The previous prime is 123105193. The next prime is 123105217. The reversal of 123105195 is 591501321.

It is not a de Polignac number, because 123105195 - 2¹ = 123105193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123105193) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1367791 + ... + 1367880.

It is an arithmetic number, because the mean of its divisors is an integer number (17781868).

Almost surely, 2^123105195 is an apocalyptic number.

123105195 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123105195 is a deficient number, since it is larger than the sum of its proper divisors (90277221).

123105195 is a wasteful number, since it uses less digits than its factorization.

123105195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2735682 (or 2735679 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 27.

The square root of 123105195 is about 11095.2780496930. The cubic root of 123105195 is about 497.4607192710.

The spelling of 123105195 in words is "one hundred twenty-three million, one hundred five thousand, one hundred ninety-five".