134605621 has 2 divisors, whose sum is σ = 134605622. Its totient is φ = 134605620.

The previous prime is 134605579. The next prime is 134605631. The reversal of 134605621 is 126506431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132503121 + 2102500 = 11511^2 + 1450^2 .

It is an emirp because it is prime and its reverse (126506431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 134605621 - 2¹⁹ = 134081333 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 134605621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134605631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67302810 + 67302811.

It is an arithmetic number, because the mean of its divisors is an integer number (67302811).

Almost surely, 2^134605621 is an apocalyptic number.

It is an amenable number.

134605621 is a deficient number, since it is larger than the sum of its proper divisors (1).

134605621 is an equidigital number, since it uses as much as digits as its factorization.

134605621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 134605621 is about 11601.9662557689. The cubic root of 134605621 is about 512.4927570660.

The spelling of 134605621 in words is "one hundred thirty-four million, six hundred five thousand, six hundred twenty-one".