135158561 has 2 divisors, whose sum is σ = 135158562. Its totient is φ = 135158560.

The previous prime is 135158537. The next prime is 135158567. The reversal of 135158561 is 165851531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96904336 + 38254225 = 9844^2 + 6185^2 .

It is a cyclic number.

It is not a de Polignac number, because 135158561 - 2¹⁰ = 135157537 is a prime.

It is a super-2 number, since 2×135158561² = 36535673223181442, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (135158567) 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, 67579280 + 67579281.

It is an arithmetic number, because the mean of its divisors is an integer number (67579281).

Almost surely, 2^135158561 is an apocalyptic number.

It is an amenable number.

135158561 is a deficient number, since it is larger than the sum of its proper divisors (1).

135158561 is an equidigital number, since it uses as much as digits as its factorization.

135158561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 35.

The square root of 135158561 is about 11625.7714152653. The cubic root of 135158561 is about 513.1935465315.

The spelling of 135158561 in words is "one hundred thirty-five million, one hundred fifty-eight thousand, five hundred sixty-one".