129869225 has 12 divisors (see below), whose sum is σ = 164465664. Its totient is φ = 101683920.

The previous prime is 129869219. The next prime is 129869227. The reversal of 129869225 is 522968921.

It is not a de Polignac number, because 129869225 - 2¹² = 129865129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129869227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54089 + ... + 56438.

It is an arithmetic number, because the mean of its divisors is an integer number (13705472).

Almost surely, 2^129869225 is an apocalyptic number.

It is an amenable number.

129869225 is a deficient number, since it is larger than the sum of its proper divisors (34596439).

129869225 is a wasteful number, since it uses less digits than its factorization.

129869225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110584 (or 110579 counting only the distinct ones).

The product of its digits is 155520, while the sum is 44.

The square root of 129869225 is about 11396.0179448788. The cubic root of 129869225 is about 506.4097783531.

The spelling of 129869225 in words is "one hundred twenty-nine million, eight hundred sixty-nine thousand, two hundred twenty-five".