135433621 has 4 divisors (see below), whose sum is σ = 135487692. Its totient is φ = 135379552.

The previous prime is 135433609. The next prime is 135433667. The reversal of 135433621 is 126334531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 84382596 + 51051025 = 9186^2 + 7145^2 .

It is a cyclic number.

It is not a de Polignac number, because 135433621 - 2⁵ = 135433589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135433621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135433681) 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, 23086 + ... + 28351.

It is an arithmetic number, because the mean of its divisors is an integer number (33871923).

Almost surely, 2^135433621 is an apocalyptic number.

It is an amenable number.

135433621 is a deficient number, since it is larger than the sum of its proper divisors (54071).

135433621 is an equidigital number, since it uses as much as digits as its factorization.

135433621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54070.

The product of its digits is 6480, while the sum is 28.

The square root of 135433621 is about 11637.5951553575. The cubic root of 135433621 is about 513.5414425306.

The spelling of 135433621 in words is "one hundred thirty-five million, four hundred thirty-three thousand, six hundred twenty-one".