129605057 has 2 divisors, whose sum is σ = 129605058. Its totient is φ = 129605056.

The previous prime is 129605029. The next prime is 129605101. The reversal of 129605057 is 750506921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125798656 + 3806401 = 11216^2 + 1951^2 .

It is a cyclic number.

It is not a de Polignac number, because 129605057 - 2⁸ = 129604801 is a prime.

It is not a weakly prime, because it can be changed into another prime (129605027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64802528 + 64802529.

It is an arithmetic number, because the mean of its divisors is an integer number (64802529).

Almost surely, 2^129605057 is an apocalyptic number.

It is an amenable number.

129605057 is a deficient number, since it is larger than the sum of its proper divisors (1).

129605057 is an equidigital number, since it uses as much as digits as its factorization.

129605057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 129605057 is about 11384.4216805247. The cubic root of 129605057 is about 506.0661812544.

It can be divided in two parts, 12 and 9605057, that added together give a palindrome (9605069).

The spelling of 129605057 in words is "one hundred twenty-nine million, six hundred five thousand, fifty-seven".