129635225 has 24 divisors (see below), whose sum is σ = 164176992. Its totient is φ = 101520000.

The previous prime is 129635221. The next prime is 129635237. The reversal of 129635225 is 522536921.

It is not a de Polignac number, because 129635225 - 2² = 129635221 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129635221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 457934 + ... + 458216.

It is an arithmetic number, because the mean of its divisors is an integer number (6840708).

Almost surely, 2^129635225 is an apocalyptic number.

It is an amenable number.

129635225 is a deficient number, since it is larger than the sum of its proper divisors (34541767).

129635225 is a wasteful number, since it uses less digits than its factorization.

129635225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617 (or 612 counting only the distinct ones).

The product of its digits is 32400, while the sum is 35.

The square root of 129635225 is about 11385.7465719205. The cubic root of 129635225 is about 506.1054436631.

The spelling of 129635225 in words is "one hundred twenty-nine million, six hundred thirty-five thousand, two hundred twenty-five".