138042475 has 12 divisors (see below), whose sum is σ = 174404016. Its totient is φ = 108349280.

The previous prime is 138042469. The next prime is 138042479. The reversal of 138042475 is 574240831.

138042475 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-138042475 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138042475.

It is not an unprimeable number, because it can be changed into a prime (138042479) 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, 50767 + ... + 53416.

It is an arithmetic number, because the mean of its divisors is an integer number (14533668).

Almost surely, 2^138042475 is an apocalyptic number.

138042475 is a deficient number, since it is larger than the sum of its proper divisors (36361541).

138042475 is a wasteful number, since it uses less digits than its factorization.

138042475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104246 (or 104241 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 138042475 is about 11749.1478414394. The cubic root of 138042475 is about 516.8179381316.

The spelling of 138042475 in words is "one hundred thirty-eight million, forty-two thousand, four hundred seventy-five".