135475521 has 16 divisors (see below), whose sum is σ = 186012288. Its totient is φ = 87651200.

The previous prime is 135475511. The next prime is 135475531. The reversal of 135475521 is 125574531.

It is an interprime number because it is at equal distance from previous prime (135475511) and next prime (135475531).

It is a cyclic number.

It is not a de Polignac number, because 135475521 - 2¹⁰ = 135474497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135475511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21436 + ... + 27026.

It is an arithmetic number, because the mean of its divisors is an integer number (11625768).

Almost surely, 2^135475521 is an apocalyptic number.

It is an amenable number.

135475521 is a deficient number, since it is larger than the sum of its proper divisors (50536767).

135475521 is a wasteful number, since it uses less digits than its factorization.

135475521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5832.

The product of its digits is 21000, while the sum is 33.

The square root of 135475521 is about 11639.3952162473. The cubic root of 135475521 is about 513.5943963138.

The spelling of 135475521 in words is "one hundred thirty-five million, four hundred seventy-five thousand, five hundred twenty-one".