135130421 has 4 divisors (see below), whose sum is σ = 135175500. Its totient is φ = 135085344.

The previous prime is 135130417. The next prime is 135130427. The reversal of 135130421 is 124031531.

135130421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 78127921 + 57002500 = 8839^2 + 7550^2 .

It is a cyclic number.

It is not a de Polignac number, because 135130421 - 2² = 135130417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 135130393 and 135130402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135130427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17696 + ... + 24153.

It is an arithmetic number, because the mean of its divisors is an integer number (33793875).

Almost surely, 2^135130421 is an apocalyptic number.

It is an amenable number.

135130421 is a deficient number, since it is larger than the sum of its proper divisors (45079).

135130421 is an equidigital number, since it uses as much as digits as its factorization.

135130421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45078.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 135130421 is about 11624.5611099946. The cubic root of 135130421 is about 513.1579284430.

Adding to 135130421 its reverse (124031531), we get a palindrome (259161952).

The spelling of 135130421 in words is "one hundred thirty-five million, one hundred thirty thousand, four hundred twenty-one".