138535 has 8 divisors (see below), whose sum is σ = 168480. Its totient is φ = 109344.

The previous prime is 138517. The next prime is 138547. The reversal of 138535 is 535831.

It is a happy number.

138535 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 138535 - 2⁷ = 138407 is a prime.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381 + ... + 649.

It is an arithmetic number, because the mean of its divisors is an integer number (21060).

2¹³⁸⁵³⁵ is an apocalyptic number.

138535 is a deficient number, since it is larger than the sum of its proper divisors (29945).

138535 is a wasteful number, since it uses less digits than its factorization.

138535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377.

The product of its digits is 1800, while the sum is 25.

The square root of 138535 is about 372.2029016545. The cubic root of 138535 is about 51.7431864196.

The spelling of 138535 in words is "one hundred thirty-eight thousand, five hundred thirty-five".