129690852 has 12 divisors (see below), whose sum is σ = 302612016. Its totient is φ = 43230280.

The previous prime is 129690839. The next prime is 129690857. The reversal of 129690852 is 258096921.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (129690857) 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 3 ways as a sum of consecutive naturals, for example, 5403774 + ... + 5403797.

It is an arithmetic number, because the mean of its divisors is an integer number (25217668).

Almost surely, 2^129690852 is an apocalyptic number.

129690852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129690852 is an abundant number, since it is smaller than the sum of its proper divisors (172921164).

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

129690852 is a wasteful number, since it uses less digits than its factorization.

129690852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10807578 (or 10807576 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 129690852 is about 11388.1891448992. The cubic root of 129690852 is about 506.1778239429.

The spelling of 129690852 in words is "one hundred twenty-nine million, six hundred ninety thousand, eight hundred fifty-two".