134120561 has 2 divisors, whose sum is σ = 134120562. Its totient is φ = 134120560.

The previous prime is 134120557. The next prime is 134120579. The reversal of 134120561 is 165021431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117310561 + 16810000 = 10831^2 + 4100^2 .

It is a cyclic number.

It is not a de Polignac number, because 134120561 - 2² = 134120557 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (134120461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67060280 + 67060281.

It is an arithmetic number, because the mean of its divisors is an integer number (67060281).

Almost surely, 2^134120561 is an apocalyptic number.

It is an amenable number.

134120561 is a deficient number, since it is larger than the sum of its proper divisors (1).

134120561 is an equidigital number, since it uses as much as digits as its factorization.

134120561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 134120561 is about 11581.0431740841. The cubic root of 134120561 is about 511.8764159425.

Adding to 134120561 its reverse (165021431), we get a palindrome (299141992).

The spelling of 134120561 in words is "one hundred thirty-four million, one hundred twenty thousand, five hundred sixty-one".