135405541 has 4 divisors (see below), whose sum is σ = 135440172. Its totient is φ = 135370912.

The previous prime is 135405539. The next prime is 135405547. The reversal of 135405541 is 145504531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 145504531 = 41 ⋅3548891.

It can be written as a sum of positive squares in 2 ways, for example, as 82901025 + 52504516 = 9105^2 + 7246^2 .

It is a cyclic number.

It is not a de Polignac number, because 135405541 - 2¹ = 135405539 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135405547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10576 + ... + 19561.

It is an arithmetic number, because the mean of its divisors is an integer number (33860043).

Almost surely, 2^135405541 is an apocalyptic number.

It is an amenable number.

135405541 is a deficient number, since it is larger than the sum of its proper divisors (34631).

135405541 is an equidigital number, since it uses as much as digits as its factorization.

135405541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34630.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 135405541 is about 11636.3886579987. The cubic root of 135405541 is about 513.5059485365.

The spelling of 135405541 in words is "one hundred thirty-five million, four hundred five thousand, five hundred forty-one".