135182561 has 2 divisors, whose sum is σ = 135182562. Its totient is φ = 135182560.

The previous prime is 135182539. The next prime is 135182603. The reversal of 135182561 is 165281531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85747600 + 49434961 = 9260^2 + 7031^2 .

It is a cyclic number.

It is not a de Polignac number, because 135182561 - 2¹⁰ = 135181537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (135187561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67591280 + 67591281.

It is an arithmetic number, because the mean of its divisors is an integer number (67591281).

Almost surely, 2^135182561 is an apocalyptic number.

It is an amenable number.

135182561 is a deficient number, since it is larger than the sum of its proper divisors (1).

135182561 is an equidigital number, since it uses as much as digits as its factorization.

135182561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 32.

The square root of 135182561 is about 11626.8035590183. The cubic root of 135182561 is about 513.2239205260.

The spelling of 135182561 in words is "one hundred thirty-five million, one hundred eighty-two thousand, five hundred sixty-one".