135221361 has 8 divisors (see below), whose sum is σ = 196685664. Its totient is φ = 81952320.

The previous prime is 135221353. The next prime is 135221363. The reversal of 135221361 is 163122531.

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

It is not a de Polignac number, because 135221361 - 2³ = 135221353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135221363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2048776 + ... + 2048841.

It is an arithmetic number, because the mean of its divisors is an integer number (24585708).

Almost surely, 2^135221361 is an apocalyptic number.

135221361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

135221361 is a deficient number, since it is larger than the sum of its proper divisors (61464303).

135221361 is a wasteful number, since it uses less digits than its factorization.

135221361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4097631.

The product of its digits is 1080, while the sum is 24.

The square root of 135221361 is about 11628.4719976444. The cubic root of 135221361 is about 513.2730175474.

Adding to 135221361 its reverse (163122531), we get a palindrome (298343892).

The spelling of 135221361 in words is "one hundred thirty-five million, two hundred twenty-one thousand, three hundred sixty-one".