135901 has 4 divisors (see below), whose sum is σ = 139612. Its totient is φ = 132192.

The previous prime is 135899. The next prime is 135911. The reversal of 135901 is 109531.

135901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is the 151-st star number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 63001 + 72900 = 251^2 + 270^2 .

It is a cyclic number.

It is not a de Polignac number, because 135901 - 2¹ = 135899 is a prime.

It is a Duffinian number.

135901 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135911) 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, 1800 + ... + 1873.

It is an arithmetic number, because the mean of its divisors is an integer number (34903).

2¹³⁵⁹⁰¹ is an apocalyptic number.

It is an amenable number.

135901 is a deficient number, since it is larger than the sum of its proper divisors (3711).

135901 is an equidigital number, since it uses as much as digits as its factorization.

135901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3710.

The product of its (nonzero) digits is 135, while the sum is 19.

The square root of 135901 is about 368.6475281349. The cubic root of 135901 is about 51.4131505058.

The spelling of 135901 in words is "one hundred thirty-five thousand, nine hundred one".