135522421 has 8 divisors (see below), whose sum is σ = 147257600. Its totient is φ = 124247520.

The previous prime is 135522403. The next prime is 135522437. The reversal of 135522421 is 124225531.

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 135522421 - 2⁵ = 135522389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135522461) 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, 114456 + ... + 115633.

It is an arithmetic number, because the mean of its divisors is an integer number (18407200).

Almost surely, 2^135522421 is an apocalyptic number.

It is an amenable number.

135522421 is a deficient number, since it is larger than the sum of its proper divisors (11735179).

135522421 is a wasteful number, since it uses less digits than its factorization.

135522421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230139.

The product of its digits is 2400, while the sum is 25.

The square root of 135522421 is about 11641.4097514004. The cubic root of 135522421 is about 513.6536562154.

Adding to 135522421 its reverse (124225531), we get a palindrome (259747952).

The spelling of 135522421 in words is "one hundred thirty-five million, five hundred twenty-two thousand, four hundred twenty-one".