138475 has 12 divisors (see below), whose sum is σ = 178560. Its totient is φ = 106400.

The previous prime is 138469. The next prime is 138493. The reversal of 138475 is 574831.

It is a de Polignac number, because none of the positive numbers 2^k-138475 is a prime.

138475 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 630 + ... + 820.

It is an arithmetic number, because the mean of its divisors is an integer number (14880).

2¹³⁸⁴⁷⁵ is an apocalyptic number.

138475 is a deficient number, since it is larger than the sum of its proper divisors (40085).

138475 is a wasteful number, since it uses less digits than its factorization.

138475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 225 counting only the distinct ones).

The product of its digits is 3360, while the sum is 28.

The square root of 138475 is about 372.1222917268. The cubic root of 138475 is about 51.7357152884.

The spelling of 138475 in words is "one hundred thirty-eight thousand, four hundred seventy-five".