129245585 has 12 divisors (see below), whose sum is σ = 180416628. Its totient is φ = 88625376.

The previous prime is 129245563. The next prime is 129245587. The reversal of 129245585 is 585542921.

It can be written as a sum of positive squares in 2 ways, for example, as 47831056 + 81414529 = 6916^2 + 9023^2 .

It is not a de Polignac number, because 129245585 - 2¹⁶ = 129180049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129245587) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 263522 + ... + 264011.

It is an arithmetic number, because the mean of its divisors is an integer number (15034719).

Almost surely, 2^129245585 is an apocalyptic number.

It is an amenable number.

129245585 is a deficient number, since it is larger than the sum of its proper divisors (51171043).

129245585 is an equidigital number, since it uses as much as digits as its factorization.

129245585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527552 (or 527545 counting only the distinct ones).

The product of its digits is 144000, while the sum is 41.

The square root of 129245585 is about 11368.6228277659. The cubic root of 129245585 is about 505.5978737313.

The spelling of 129245585 in words is "one hundred twenty-nine million, two hundred forty-five thousand, five hundred eighty-five".