135643 has 8 divisors (see below), whose sum is σ = 146880. Its totient is φ = 124800.

The previous prime is 135637. The next prime is 135647. The reversal of 135643 is 346531.

135643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 135643 - 2⁹ = 135131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1293 + ... + 1393.

It is an arithmetic number, because the mean of its divisors is an integer number (18360).

2¹³⁵⁶⁴³ is an apocalyptic number.

135643 is a deficient number, since it is larger than the sum of its proper divisors (11237).

135643 is a wasteful number, since it uses less digits than its factorization.

135643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197.

The product of its digits is 1080, while the sum is 22.

The square root of 135643 is about 368.2974341480. The cubic root of 135643 is about 51.3805949551.

The spelling of 135643 in words is "one hundred thirty-five thousand, six hundred forty-three".