135350521 has 4 divisors (see below), whose sum is σ = 137569444. Its totient is φ = 133131600.

The previous prime is 135350513. The next prime is 135350531. The reversal of 135350521 is 125053531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125053531 = 9227 ⋅13553.

It can be written as a sum of positive squares in 2 ways, for example, as 32936121 + 102414400 = 5739^2 + 10120^2 .

It is a cyclic number.

It is not a de Polignac number, because 135350521 - 2³ = 135350513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135350531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1109370 + ... + 1109491.

It is an arithmetic number, because the mean of its divisors is an integer number (34392361).

Almost surely, 2^135350521 is an apocalyptic number.

It is an amenable number.

135350521 is a deficient number, since it is larger than the sum of its proper divisors (2218923).

135350521 is an equidigital number, since it uses as much as digits as its factorization.

135350521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2218922.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 135350521 is about 11634.0242822507. The cubic root of 135350521 is about 513.4363873140.

The spelling of 135350521 in words is "one hundred thirty-five million, three hundred fifty thousand, five hundred twenty-one".