135204421 has 8 divisors (see below), whose sum is σ = 147592224. Its totient is φ = 122832720.

The previous prime is 135204403. The next prime is 135204457. The reversal of 135204421 is 124402531.

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 135204421 - 2⁵ = 135204389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135204392 and 135204401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135204481) 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, 19590 + ... + 25576.

It is an arithmetic number, because the mean of its divisors is an integer number (18449028).

Almost surely, 2^135204421 is an apocalyptic number.

135204421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

135204421 is a deficient number, since it is larger than the sum of its proper divisors (12387803).

135204421 is a wasteful number, since it uses less digits than its factorization.

135204421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8051.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 135204421 is about 11627.7435902242. The cubic root of 135204421 is about 513.2515830443.

Adding to 135204421 its reverse (124402531), we get a palindrome (259606952).

The spelling of 135204421 in words is "one hundred thirty-five million, two hundred four thousand, four hundred twenty-one".