136506121 has 2 divisors, whose sum is σ = 136506122. Its totient is φ = 136506120.

The previous prime is 136506119. The next prime is 136506133. The reversal of 136506121 is 121605631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134444025 + 2062096 = 11595^2 + 1436^2 .

It is a cyclic number.

It is not a de Polignac number, because 136506121 - 2¹ = 136506119 is a prime.

Together with 136506119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (136506151) 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 as a sum of consecutive naturals, namely, 68253060 + 68253061.

It is an arithmetic number, because the mean of its divisors is an integer number (68253061).

Almost surely, 2^136506121 is an apocalyptic number.

It is an amenable number.

136506121 is a deficient number, since it is larger than the sum of its proper divisors (1).

136506121 is an equidigital number, since it uses as much as digits as its factorization.

136506121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 136506121 is about 11683.5833972288. The cubic root of 136506121 is about 514.8934595961.

The spelling of 136506121 in words is "one hundred thirty-six million, five hundred six thousand, one hundred twenty-one".