129685050 has 240 divisors, whose sum is σ = 408348864. Its totient is φ = 30240000.

The previous prime is 129685007. The next prime is 129685097. The reversal of 129685050 is 50586921.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 129684996 and 129685014.

It is an unprimeable number.

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 119 ways as a sum of consecutive naturals, for example, 1826515 + ... + 1826585.

Almost surely, 2^129685050 is an apocalyptic number.

129685050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 129685050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204174432).

129685050 is an abundant number, since it is smaller than the sum of its proper divisors (278663814).

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

129685050 is a wasteful number, since it uses less digits than its factorization.

129685050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 129685050 is about 11387.9344044475. The cubic root of 129685050 is about 506.1702755115.

The spelling of 129685050 in words is "one hundred twenty-nine million, six hundred eighty-five thousand, fifty".