135241569 has 10 divisors (see below), whose sum is σ = 202027650. Its totient is φ = 90160992.

The previous prime is 135241567. The next prime is 135241573. The reversal of 135241569 is 965142531.

135241569 is a `hidden beast` number, since 1 + 3 + 52 + 41 + 569 = 666.

135241569 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 70358544 + 64883025 = 8388^2 + 8055^2 .

It is not a de Polignac number, because 135241569 - 2¹ = 135241567 is a prime.

It is a super-4 number, since 4×135241569⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (135241567) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 834744 + ... + 834905.

It is an arithmetic number, because the mean of its divisors is an integer number (20202765).

Almost surely, 2^135241569 is an apocalyptic number.

It is an amenable number.

135241569 is a deficient number, since it is larger than the sum of its proper divisors (66786081).

135241569 is an equidigital number, since it uses as much as digits as its factorization.

135241569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1669661 (or 1669652 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 135241569 is about 11629.3408669623. The cubic root of 135241569 is about 513.2985847714.

The spelling of 135241569 in words is "one hundred thirty-five million, two hundred forty-one thousand, five hundred sixty-nine".