135208 has 8 divisors (see below), whose sum is σ = 253530. Its totient is φ = 67600.

The previous prime is 135197. The next prime is 135209. The reversal of 135208 is 802531.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 68644 + 66564 = 262^2 + 258^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (135209) by changing a digit.

135208 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8443 + ... + 8458.

2¹³⁵²⁰⁸ is an apocalyptic number.

It is an amenable number.

135208 is a deficient number, since it is larger than the sum of its proper divisors (118322).

135208 is a wasteful number, since it uses less digits than its factorization.

135208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16907 (or 16903 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 135208 is about 367.7064046219. The cubic root of 135208 is about 51.3256111770.

Adding to 135208 its reverse (802531), we get a palindrome (937739).

It can be divided in two parts, 135 and 208, that added together give a palindrome (343).

The spelling of 135208 in words is "one hundred thirty-five thousand, two hundred eight".