135142961 has 2 divisors, whose sum is σ = 135142962. Its totient is φ = 135142960.

The previous prime is 135142939. The next prime is 135143051. The reversal of 135142961 is 169241531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131790400 + 3352561 = 11480^2 + 1831^2 .

It is a cyclic number.

It is not a de Polignac number, because 135142961 - 2⁶ = 135142897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (135142561) 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, 67571480 + 67571481.

It is an arithmetic number, because the mean of its divisors is an integer number (67571481).

Almost surely, 2^135142961 is an apocalyptic number.

It is an amenable number.

135142961 is a deficient number, since it is larger than the sum of its proper divisors (1).

135142961 is an equidigital number, since it uses as much as digits as its factorization.

135142961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 32.

The square root of 135142961 is about 11625.1004726841. The cubic root of 135142961 is about 513.1738015068.

The spelling of 135142961 in words is "one hundred thirty-five million, one hundred forty-two thousand, nine hundred sixty-one".