138471 has 8 divisors (see below), whose sum is σ = 186864. Its totient is φ = 91200.

The previous prime is 138469. The next prime is 138493. The reversal of 138471 is 174831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138471 - 2¹ = 138469 is a prime.

It is a super-3 number, since 3×138471³ = 7965219355983333, which contains 333 as substring.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 138471.

It is not an unprimeable number, because it can be changed into a prime (138401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75 + ... + 531.

It is an arithmetic number, because the mean of its divisors is an integer number (23358).

2¹³⁸⁴⁷¹ is an apocalyptic number.

138471 is a deficient number, since it is larger than the sum of its proper divisors (48393).

138471 is a wasteful number, since it uses less digits than its factorization.

138471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561.

The product of its digits is 672, while the sum is 24.

The square root of 138471 is about 372.1169171107. The cubic root of 138471 is about 51.7352171363.

The spelling of 138471 in words is "one hundred thirty-eight thousand, four hundred seventy-one".