129173425 has 12 divisors (see below), whose sum is σ = 161162800. Its totient is φ = 102701520.

The previous prime is 129173413. The next prime is 129173431. The reversal of 129173425 is 524371921.

It is a happy number.

It is not a de Polignac number, because 129173425 - 2¹³ = 129165233 is a prime.

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, 11775 + ... + 19924.

Almost surely, 2^129173425 is an apocalyptic number.

It is an amenable number.

129173425 is a deficient number, since it is larger than the sum of its proper divisors (31989375).

129173425 is a wasteful number, since it uses less digits than its factorization.

129173425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31872 (or 31867 counting only the distinct ones).

The product of its digits is 15120, while the sum is 34.

The square root of 129173425 is about 11365.4487372915. The cubic root of 129173425 is about 505.5037615945.

The spelling of 129173425 in words is "one hundred twenty-nine million, one hundred seventy-three thousand, four hundred twenty-five".