136871 has 4 divisors (see below), whose sum is σ = 156432. Its totient is φ = 117312.

The previous prime is 136861. The next prime is 136879. The reversal of 136871 is 178631.

136871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 178631 = 73 ⋅2447.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136871 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9770 + ... + 9783.

It is an arithmetic number, because the mean of its divisors is an integer number (39108).

2¹³⁶⁸⁷¹ is an apocalyptic number.

136871 is a deficient number, since it is larger than the sum of its proper divisors (19561).

136871 is an equidigital number, since it uses as much as digits as its factorization.

136871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19560.

The product of its digits is 1008, while the sum is 26.

The square root of 136871 is about 369.9608087352. The cubic root of 136871 is about 51.5351819174.

The spelling of 136871 in words is "one hundred thirty-six thousand, eight hundred seventy-one".