138585271 has 4 divisors (see below), whose sum is σ = 151183944. Its totient is φ = 125986600.

The previous prime is 138585263. The next prime is 138585299. The reversal of 138585271 is 172585831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 172585831 = 11 ⋅15689621.

It is a cyclic number.

It is not a de Polignac number, because 138585271 - 2³ = 138585263 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138585211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6299320 + ... + 6299341.

It is an arithmetic number, because the mean of its divisors is an integer number (37795986).

Almost surely, 2^138585271 is an apocalyptic number.

138585271 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

138585271 is a deficient number, since it is larger than the sum of its proper divisors (12598673).

138585271 is a wasteful number, since it uses less digits than its factorization.

138585271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12598672.

The product of its digits is 67200, while the sum is 40.

The square root of 138585271 is about 11772.2245561321. The cubic root of 138585271 is about 517.4944444626.

The spelling of 138585271 in words is "one hundred thirty-eight million, five hundred eighty-five thousand, two hundred seventy-one".