136538 has 8 divisors (see below), whose sum is σ = 206388. Its totient is φ = 67744.

The previous prime is 136537. The next prime is 136541. The reversal of 136538 is 835631.

It can be written as a sum of positive squares in 2 ways, for example, as 134689 + 1849 = 367^2 + 43^2 .

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

It is not an unprimeable number, because it can be changed into a prime (136531) 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, 320 + ... + 612.

2¹³⁶⁵³⁸ is an apocalyptic number.

136538 is a deficient number, since it is larger than the sum of its proper divisors (69850).

136538 is a wasteful number, since it uses less digits than its factorization.

136538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528.

The product of its digits is 2160, while the sum is 26.

The square root of 136538 is about 369.5104869960. The cubic root of 136538 is about 51.4933538412.

The spelling of 136538 in words is "one hundred thirty-six thousand, five hundred thirty-eight".