135455921 has 4 divisors (see below), whose sum is σ = 142585200. Its totient is φ = 128326644.

The previous prime is 135455911. The next prime is 135455939. The reversal of 135455921 is 129554531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 135455921 - 2¹⁰ = 135454897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135455911) 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 3 ways as a sum of consecutive naturals, for example, 3564611 + ... + 3564648.

It is an arithmetic number, because the mean of its divisors is an integer number (35646300).

Almost surely, 2^135455921 is an apocalyptic number.

It is an amenable number.

135455921 is a deficient number, since it is larger than the sum of its proper divisors (7129279).

135455921 is an equidigital number, since it uses as much as digits as its factorization.

135455921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7129278.

The product of its digits is 27000, while the sum is 35.

The square root of 135455921 is about 11638.5532176469. The cubic root of 135455921 is about 513.5696269297.

It can be divided in two parts, 1354 and 55921, that added together give a palindrome (57275).

The spelling of 135455921 in words is "one hundred thirty-five million, four hundred fifty-five thousand, nine hundred twenty-one".