129142680 has 64 divisors (see below), whose sum is σ = 388856160. Its totient is φ = 34311168.

The previous prime is 129142667. The next prime is 129142703. The reversal of 129142680 is 86241921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33324 + ... + 36996.

Almost surely, 2^129142680 is an apocalyptic number.

129142680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129142680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194428080).

129142680 is an abundant number, since it is smaller than the sum of its proper divisors (259713480).

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

129142680 is a wasteful number, since it uses less digits than its factorization.

129142680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3980 (or 3976 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 129142680 is about 11364.0960925188. The cubic root of 129142680 is about 505.4636528638.

The spelling of 129142680 in words is "one hundred twenty-nine million, one hundred forty-two thousand, six hundred eighty".