136671 has 4 divisors (see below), whose sum is σ = 182232. Its totient is φ = 91112.

The previous prime is 136657. The next prime is 136691. The reversal of 136671 is 176631.

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

It is a cyclic number.

It is not a de Polignac number, because 136671 - 2⁶ = 136607 is a prime.

It is a D-number.

136671 is a lucky number.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22776 + ... + 22781.

It is an arithmetic number, because the mean of its divisors is an integer number (45558).

2¹³⁶⁶⁷¹ is an apocalyptic number.

136671 is a deficient number, since it is larger than the sum of its proper divisors (45561).

136671 is an equidigital number, since it uses as much as digits as its factorization.

136671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45560.

The product of its digits is 756, while the sum is 24.

The square root of 136671 is about 369.6904110198. The cubic root of 136671 is about 51.5100680979.

The spelling of 136671 in words is "one hundred thirty-six thousand, six hundred seventy-one".