138512 has 20 divisors (see below), whose sum is σ = 293136. Its totient is φ = 62880.

The previous prime is 138511. The next prime is 138517. The reversal of 138512 is 215831.

It is not an unprimeable number, because it can be changed into a prime (138511) 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, 218 + ... + 569.

2¹³⁸⁵¹² is an apocalyptic number.

It is an amenable number.

138512 is an abundant number, since it is smaller than the sum of its proper divisors (154624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138512 is a wasteful number, since it uses less digits than its factorization.

138512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806 (or 800 counting only the distinct ones).

The product of its digits is 240, while the sum is 20.

The square root of 138512 is about 372.1720032458. The cubic root of 138512 is about 51.7403227410.

The spelling of 138512 in words is "one hundred thirty-eight thousand, five hundred twelve".