135843621 has 8 divisors (see below), whose sum is σ = 181458144. Its totient is φ = 90395760.

The previous prime is 135843607. The next prime is 135843623. The reversal of 135843621 is 126348531.

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

It is not a de Polignac number, because 135843621 - 2⁹ = 135843109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135843623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39750 + ... + 43031.

It is an arithmetic number, because the mean of its divisors is an integer number (22682268).

Almost surely, 2^135843621 is an apocalyptic number.

It is an amenable number.

135843621 is a deficient number, since it is larger than the sum of its proper divisors (45614523).

135843621 is an equidigital number, since it uses as much as digits as its factorization.

135843621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83331.

The product of its digits is 17280, while the sum is 33.

The square root of 135843621 is about 11655.1971669294. The cubic root of 135843621 is about 514.0591374170.

It can be divided in two parts, 13584 and 3621, that added together give a triangular number (17205 = T₁₈₅).

The spelling of 135843621 in words is "one hundred thirty-five million, eight hundred forty-three thousand, six hundred twenty-one".