135585321 has 12 divisors (see below), whose sum is σ = 185089968. Its totient is φ = 88284504.

The previous prime is 135585313. The next prime is 135585337. The reversal of 135585321 is 123585531.

It is not a de Polignac number, because 135585321 - 2³ = 135585313 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (135585301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6675 + ... + 17768.

It is an arithmetic number, because the mean of its divisors is an integer number (15424164).

Almost surely, 2^135585321 is an apocalyptic number.

It is an amenable number.

135585321 is a deficient number, since it is larger than the sum of its proper divisors (49504647).

135585321 is an equidigital number, since it uses as much as digits as its factorization.

135585321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24532 (or 24489 counting only the distinct ones).

The product of its digits is 18000, while the sum is 33.

The square root of 135585321 is about 11644.1110008450. Note that the first 3 decimals coincide. The cubic root of 135585321 is about 513.7331112545.

The spelling of 135585321 in words is "one hundred thirty-five million, five hundred eighty-five thousand, three hundred twenty-one".