129225975 has 24 divisors (see below), whose sum is σ = 214309200. Its totient is φ = 68709120.

The previous prime is 129225947. The next prime is 129225977. The reversal of 129225975 is 579522921.

It is not a de Polignac number, because 129225975 - 2⁹ = 129225463 is a prime.

It is a super-2 number, since 2×129225975² = 33398705229401250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129225977) 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 23 ways as a sum of consecutive naturals, for example, 23707 + ... + 28643.

It is an arithmetic number, because the mean of its divisors is an integer number (8929550).

Almost surely, 2^129225975 is an apocalyptic number.

129225975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129225975 is a deficient number, since it is larger than the sum of its proper divisors (85083225).

129225975 is a wasteful number, since it uses less digits than its factorization.

129225975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5299 (or 5294 counting only the distinct ones).

The product of its digits is 113400, while the sum is 42.

The square root of 129225975 is about 11367.7603335046. The cubic root of 129225975 is about 505.5723015469.

The spelling of 129225975 in words is "one hundred twenty-nine million, two hundred twenty-five thousand, nine hundred seventy-five".