129245285 has 12 divisors (see below), whose sum is σ = 167943492. Its totient is φ = 95442048.

The previous prime is 129245269. The next prime is 129245297. The reversal of 129245285 is 582542921.

It can be written as a sum of positive squares in 6 ways, for example, as 46689889 + 82555396 = 6833^2 + 9086^2 .

It is not a de Polignac number, because 129245285 - 2⁴ = 129245269 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75632 + ... + 77321.

It is an arithmetic number, because the mean of its divisors is an integer number (13995291).

Almost surely, 2^129245285 is an apocalyptic number.

It is an amenable number.

129245285 is a deficient number, since it is larger than the sum of its proper divisors (38698207).

129245285 is a wasteful number, since it uses less digits than its factorization.

129245285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152984 (or 152971 counting only the distinct ones).

The product of its digits is 57600, while the sum is 38.

The square root of 129245285 is about 11368.6096335480. The cubic root of 129245285 is about 505.5974825394.

The spelling of 129245285 in words is "one hundred twenty-nine million, two hundred forty-five thousand, two hundred eighty-five".