138742475 has 12 divisors (see below), whose sum is σ = 172190616. Its totient is φ = 110897280.

The previous prime is 138742469. The next prime is 138742511. The reversal of 138742475 is 574247831.

It is not a de Polignac number, because 138742475 - 2²² = 134548171 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45344 + ... + 48306.

It is an arithmetic number, because the mean of its divisors is an integer number (14349218).

Almost surely, 2^138742475 is an apocalyptic number.

138742475 is a deficient number, since it is larger than the sum of its proper divisors (33448141).

138742475 is a wasteful number, since it uses less digits than its factorization.

138742475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4846 (or 4841 counting only the distinct ones).

The product of its digits is 188160, while the sum is 41.

The square root of 138742475 is about 11778.8995665979. The cubic root of 138742475 is about 517.6900435448.

The spelling of 138742475 in words is "one hundred thirty-eight million, seven hundred forty-two thousand, four hundred seventy-five".