135221659 has 8 divisors (see below), whose sum is σ = 140175360. Its totient is φ = 130305000.

The previous prime is 135221633. The next prime is 135221677. The reversal of 135221659 is 956122531.

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

It is a cyclic number.

It is not a de Polignac number, because 135221659 - 2⁹ = 135221147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135221629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1717 + ... + 16534.

It is an arithmetic number, because the mean of its divisors is an integer number (17521920).

Almost surely, 2^135221659 is an apocalyptic number.

135221659 is a deficient number, since it is larger than the sum of its proper divisors (4953701).

135221659 is a wasteful number, since it uses less digits than its factorization.

135221659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18521.

The product of its digits is 16200, while the sum is 34.

The square root of 135221659 is about 11628.4848110147. The cubic root of 135221659 is about 513.2733945964.

The spelling of 135221659 in words is "one hundred thirty-five million, two hundred twenty-one thousand, six hundred fifty-nine".