135992 has 16 divisors (see below), whose sum is σ = 259200. Its totient is φ = 66880.

The previous prime is 135979. The next prime is 136013. The reversal of 135992 is 299531.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 617 + ... + 807.

It is an arithmetic number, because the mean of its divisors is an integer number (16200).

2¹³⁵⁹⁹² is an apocalyptic number.

It is an amenable number.

135992 is a deficient number, since it is larger than the sum of its proper divisors (123208).

135992 is a wasteful number, since it uses less digits than its factorization.

135992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286 (or 282 counting only the distinct ones).

The product of its digits is 2430, while the sum is 29.

The square root of 135992 is about 368.7709316093. The cubic root of 135992 is about 51.4246234477.

The spelling of 135992 in words is "one hundred thirty-five thousand, nine hundred ninety-two".