138575115 has 96 divisors (see below), whose sum is σ = 296165376. Its totient is φ = 58544640.

The previous prime is 138575093. The next prime is 138575117. The reversal of 138575115 is 511575831.

138575115 is a `hidden beast` number, since 138 + 5 + 7 + 511 + 5 = 666.

It is not a de Polignac number, because 138575115 - 2¹⁰ = 138574091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138575115.

It is not an unprimeable number, because it can be changed into a prime (138575117) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 224287 + ... + 224903.

It is an arithmetic number, because the mean of its divisors is an integer number (3085056).

Almost surely, 2^138575115 is an apocalyptic number.

138575115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138575115 is an abundant number, since it is smaller than the sum of its proper divisors (157590261).

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

138575115 is a wasteful number, since it uses less digits than its factorization.

138575115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689 (or 686 counting only the distinct ones).

The product of its digits is 21000, while the sum is 36.

The square root of 138575115 is about 11771.7931939021. The cubic root of 138575115 is about 517.4818029028.

The spelling of 138575115 in words is "one hundred thirty-eight million, five hundred seventy-five thousand, one hundred fifteen".