135741 has 4 divisors (see below), whose sum is σ = 180992. Its totient is φ = 90492.

The previous prime is 135731. The next prime is 135743. The reversal of 135741 is 147531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 147531 = 3 ⋅49177.

It is not a de Polignac number, because 135741 - 2⁷ = 135613 is a prime.

It is a super-3 number, since 3×135741³ = 7503335879022063, which contains 333 as substring.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135743) 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, 22621 + ... + 22626.

It is an arithmetic number, because the mean of its divisors is an integer number (45248).

2¹³⁵⁷⁴¹ is an apocalyptic number.

It is an amenable number.

135741 is a deficient number, since it is larger than the sum of its proper divisors (45251).

135741 is an equidigital number, since it uses as much as digits as its factorization.

135741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45250.

The product of its digits is 420, while the sum is 21.

The square root of 135741 is about 368.4304547672. The cubic root of 135741 is about 51.3929658752.

Adding to 135741 its product of digits (420), we get a square (136161 = 369²).

The spelling of 135741 in words is "one hundred thirty-five thousand, seven hundred forty-one".