129163125 has 80 divisors (see below), whose sum is σ = 265215104. Its totient is φ = 54432000.

The previous prime is 129163123. The next prime is 129163141. The reversal of 129163125 is 521361921.

It is not a de Polignac number, because 129163125 - 2¹ = 129163123 is a prime.

It is a super-2 number, since 2×129163125² = 33366225719531250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129163092 and 129163101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129163123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 170247 + ... + 171003.

Almost surely, 2^129163125 is an apocalyptic number.

129163125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129163125 is an abundant number, since it is smaller than the sum of its proper divisors (136051979).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129163125 is an equidigital number, since it uses as much as digits as its factorization.

129163125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800 (or 785 counting only the distinct ones).

The product of its digits is 3240, while the sum is 30.

The square root of 129163125 is about 11364.9956005271. The cubic root of 129163125 is about 505.4903253242.

The spelling of 129163125 in words is "one hundred twenty-nine million, one hundred sixty-three thousand, one hundred twenty-five".