129246825 has 12 divisors (see below), whose sum is σ = 213688208. Its totient is φ = 68931600.

The previous prime is 129246773. The next prime is 129246839. The reversal of 129246825 is 528642921.

It is not a de Polignac number, because 129246825 - 2¹⁰ = 129245801 is a prime.

It is a Duffinian number.

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, 861571 + ... + 861720.

Almost surely, 2^129246825 is an apocalyptic number.

129246825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129246825 is a deficient number, since it is larger than the sum of its proper divisors (84441383).

129246825 is a wasteful number, since it uses less digits than its factorization.

129246825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1723304 (or 1723299 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 129246825 is about 11368.6773637042. The cubic root of 129246825 is about 505.5994906514.

The spelling of 129246825 in words is "one hundred twenty-nine million, two hundred forty-six thousand, eight hundred twenty-five".