136865 has 8 divisors (see below), whose sum is σ = 169728. Its totient is φ = 105840.

The previous prime is 136861. The next prime is 136879. The reversal of 136865 is 568631.

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

It is not a de Polignac number, because 136865 - 2² = 136861 is a prime.

It is a Duffinian number.

It is a zygodrome in base 7.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 136865.

It is not an unprimeable number, because it can be changed into a prime (136861) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 287 + ... + 596.

It is an arithmetic number, because the mean of its divisors is an integer number (21216).

2¹³⁶⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

136865 is a deficient number, since it is larger than the sum of its proper divisors (32863).

136865 is an equidigital number, since it uses as much as digits as its factorization.

136865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919.

The product of its digits is 4320, while the sum is 29.

The square root of 136865 is about 369.9526996793. The cubic root of 136865 is about 51.5344288589.

It can be divided in two parts, 136 and 865, that added together give a palindrome (1001).

The spelling of 136865 in words is "one hundred thirty-six thousand, eight hundred sixty-five".