123140115 has 32 divisors (see below), whose sum is σ = 250191360. Its totient is φ = 56292192.

The previous prime is 123140099. The next prime is 123140117. The reversal of 123140115 is 511041321.

It is not a de Polignac number, because 123140115 - 2⁴ = 123140099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123140117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64209 + ... + 66098.

It is an arithmetic number, because the mean of its divisors is an integer number (7818480).

Almost surely, 2^123140115 is an apocalyptic number.

123140115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123140115 is an abundant number, since it is smaller than the sum of its proper divisors (127051245).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123140115 is a wasteful number, since it uses less digits than its factorization.

123140115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130328 (or 130322 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 123140115 is about 11096.8515805160. The cubic root of 123140115 is about 497.5077513670.

Adding to 123140115 its reverse (511041321), we get a palindrome (634181436).

The spelling of 123140115 in words is "one hundred twenty-three million, one hundred forty thousand, one hundred fifteen".