129565057 has 2 divisors, whose sum is σ = 129565058. Its totient is φ = 129565056.

The previous prime is 129565021. The next prime is 129565061. The reversal of 129565057 is 750565921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128346241 + 1218816 = 11329^2 + 1104^2 .

It is a cyclic number.

It is not a de Polignac number, because 129565057 - 2¹¹ = 129563009 is a prime.

It is not a weakly prime, because it can be changed into another prime (129565067) 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, 64782528 + 64782529.

It is an arithmetic number, because the mean of its divisors is an integer number (64782529).

Almost surely, 2^129565057 is an apocalyptic number.

It is an amenable number.

129565057 is a deficient number, since it is larger than the sum of its proper divisors (1).

129565057 is an equidigital number, since it uses as much as digits as its factorization.

129565057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94500, while the sum is 40.

The square root of 129565057 is about 11382.6647583068. The cubic root of 129565057 is about 506.0141135070.

The spelling of 129565057 in words is "one hundred twenty-nine million, five hundred sixty-five thousand, fifty-seven".