138275075 has 12 divisors (see below), whose sum is σ = 171765048. Its totient is φ = 110424000.

The previous prime is 138275063. The next prime is 138275077. The reversal of 138275075 is 570572831.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-138275075 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138275077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10424 + ... + 19626.

It is an arithmetic number, because the mean of its divisors is an integer number (14313754).

Almost surely, 2^138275075 is an apocalyptic number.

138275075 is a deficient number, since it is larger than the sum of its proper divisors (33489973).

138275075 is an equidigital number, since it uses as much as digits as its factorization.

138275075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9814 (or 9809 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 38.

The square root of 138275075 is about 11759.0422654228. The cubic root of 138275075 is about 517.1080526948.

The spelling of 138275075 in words is "one hundred thirty-eight million, two hundred seventy-five thousand, seventy-five".