134042021 has 2 divisors, whose sum is σ = 134042022. Its totient is φ = 134042020.

The previous prime is 134042011. The next prime is 134042057. The reversal of 134042021 is 120240431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131997121 + 2044900 = 11489^2 + 1430^2 .

It is an emirp because it is prime and its reverse (120240431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 134042021 - 2¹⁰ = 134040997 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134042011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67021010 + 67021011.

It is an arithmetic number, because the mean of its divisors is an integer number (67021011).

Almost surely, 2^134042021 is an apocalyptic number.

It is an amenable number.

134042021 is a deficient number, since it is larger than the sum of its proper divisors (1).

134042021 is an equidigital number, since it uses as much as digits as its factorization.

134042021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 134042021 is about 11577.6517912744. The cubic root of 134042021 is about 511.7764794291.

Adding to 134042021 its reverse (120240431), we get a palindrome (254282452).

The spelling of 134042021 in words is "one hundred thirty-four million, forty-two thousand, twenty-one".