136605 has 16 divisors (see below), whose sum is σ = 249984. Its totient is φ = 62400.

The previous prime is 136603. The next prime is 136607. The reversal of 136605 is 506631.

136605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (136603) and next prime (136607).

It is not a de Polignac number, because 136605 - 2¹ = 136603 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 546 + ... + 755.

It is an arithmetic number, because the mean of its divisors is an integer number (15624).

2¹³⁶⁶⁰⁵ is an apocalyptic number.

136605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

136605 is a deficient number, since it is larger than the sum of its proper divisors (113379).

136605 is a wasteful number, since it uses less digits than its factorization.

136605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 136605 is about 369.6011363619. The cubic root of 136605 is about 51.5017751611.

It can be divided in two parts, 136 and 605, that added together give a triangular number (741 = T₃₈).

The spelling of 136605 in words is "one hundred thirty-six thousand, six hundred five".