135706 has 4 divisors (see below), whose sum is σ = 203562. Its totient is φ = 67852.

The previous prime is 135701. The next prime is 135719. The reversal of 135706 is 607531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 99225 + 36481 = 315^2 + 191^2 .

It is a super-3 number, since 3×135706³ = 7497533305427448, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (135701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33925 + ... + 33928.

2¹³⁵⁷⁰⁶ is an apocalyptic number.

135706 is a deficient number, since it is larger than the sum of its proper divisors (67856).

135706 is an equidigital number, since it uses as much as digits as its factorization.

135706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67855.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 135706 is about 368.3829529172. The cubic root of 135706 is about 51.3885483731.

It can be divided in two parts, 135 and 706, that added together give a square (841 = 29²).

The spelling of 135706 in words is "one hundred thirty-five thousand, seven hundred six".