135571049 has 2 divisors, whose sum is σ = 135571050. Its totient is φ = 135571048.

The previous prime is 135571043. The next prime is 135571057. The reversal of 135571049 is 940175531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97871449 + 37699600 = 9893^2 + 6140^2 .

It is a cyclic number.

It is not a de Polignac number, because 135571049 - 2⁸ = 135570793 is a prime.

It is not a weakly prime, because it can be changed into another prime (135571043) 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, 67785524 + 67785525.

It is an arithmetic number, because the mean of its divisors is an integer number (67785525).

Almost surely, 2^135571049 is an apocalyptic number.

It is an amenable number.

135571049 is a deficient number, since it is larger than the sum of its proper divisors (1).

135571049 is an equidigital number, since it uses as much as digits as its factorization.

135571049 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 35.

The square root of 135571049 is about 11643.4981427404. The cubic root of 135571049 is about 513.7150850744.

The spelling of 135571049 in words is "one hundred thirty-five million, five hundred seventy-one thousand, forty-nine".