134530021 has 4 divisors (see below), whose sum is σ = 136372972. Its totient is φ = 132687072.

The previous prime is 134529973. The next prime is 134530087. The reversal of 134530021 is 120035431.

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 90041121 + 44488900 = 9489^2 + 6670^2 .

It is a cyclic number.

It is not a de Polignac number, because 134530021 - 2⁷ = 134529893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134530321) 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, 921366 + ... + 921511.

It is an arithmetic number, because the mean of its divisors is an integer number (34093243).

Almost surely, 2^134530021 is an apocalyptic number.

It is an amenable number.

134530021 is a deficient number, since it is larger than the sum of its proper divisors (1842951).

134530021 is an equidigital number, since it uses as much as digits as its factorization.

134530021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842950.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 134530021 is about 11598.7077297430. The cubic root of 134530021 is about 512.3967934950.

Adding to 134530021 its reverse (120035431), we get a palindrome (254565452).

The spelling of 134530021 in words is "one hundred thirty-four million, five hundred thirty thousand, twenty-one".