135043521 has 8 divisors (see below), whose sum is σ = 184245600. Its totient is φ = 87935232.

The previous prime is 135043499. The next prime is 135043541. The reversal of 135043521 is 125340531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135043521 - 2⁹ = 135043009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135043491 and 135043500.

It is not an unprimeable number, because it can be changed into a prime (135043541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 523296 + ... + 523553.

It is an arithmetic number, because the mean of its divisors is an integer number (23030700).

Almost surely, 2^135043521 is an apocalyptic number.

It is an amenable number.

135043521 is a deficient number, since it is larger than the sum of its proper divisors (49202079).

135043521 is a wasteful number, since it uses less digits than its factorization.

135043521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046895.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 135043521 is about 11620.8227333524. The cubic root of 135043521 is about 513.0479039049.

The spelling of 135043521 in words is "one hundred thirty-five million, forty-three thousand, five hundred twenty-one".