135884521 has 2 divisors, whose sum is σ = 135884522. Its totient is φ = 135884520.

The previous prime is 135884513. The next prime is 135884533. The reversal of 135884521 is 125488531.

135884521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128936025 + 6948496 = 11355^2 + 2636^2 .

It is a cyclic number.

It is not a de Polignac number, because 135884521 - 2³ = 135884513 is a prime.

It is not a weakly prime, because it can be changed into another prime (135884591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67942260 + 67942261.

It is an arithmetic number, because the mean of its divisors is an integer number (67942261).

Almost surely, 2^135884521 is an apocalyptic number.

It is an amenable number.

135884521 is a deficient number, since it is larger than the sum of its proper divisors (1).

135884521 is an equidigital number, since it uses as much as digits as its factorization.

135884521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38400, while the sum is 37.

The square root of 135884521 is about 11656.9516169537. The cubic root of 135884521 is about 514.1107234707.

The spelling of 135884521 in words is "one hundred thirty-five million, eight hundred eighty-four thousand, five hundred twenty-one".