135076561 has 2 divisors, whose sum is σ = 135076562. Its totient is φ = 135076560.

The previous prime is 135076559. The next prime is 135076609. The reversal of 135076561 is 165670531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71571600 + 63504961 = 8460^2 + 7969^2 .

It is a cyclic number.

It is not a de Polignac number, because 135076561 - 2¹ = 135076559 is a prime.

Together with 135076559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (135076661) 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, 67538280 + 67538281.

It is an arithmetic number, because the mean of its divisors is an integer number (67538281).

Almost surely, 2^135076561 is an apocalyptic number.

It is an amenable number.

135076561 is a deficient number, since it is larger than the sum of its proper divisors (1).

135076561 is an equidigital number, since it uses as much as digits as its factorization.

135076561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 135076561 is about 11622.2442325052. The cubic root of 135076561 is about 513.0897415791.

The spelling of 135076561 in words is "one hundred thirty-five million, seventy-six thousand, five hundred sixty-one".