129156080 has 40 divisors (see below), whose sum is σ = 300782832. Its totient is φ = 51577344.

The previous prime is 129156061. The next prime is 129156107. The reversal of 129156080 is 80651921.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74099 + ... + 75821.

Almost surely, 2^129156080 is an apocalyptic number.

129156080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129156080 is an abundant number, since it is smaller than the sum of its proper divisors (171626752).

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

129156080 is a wasteful number, since it uses less digits than its factorization.

129156080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2673 (or 2667 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 129156080 is about 11364.6856533738. The cubic root of 129156080 is about 505.4811347649.

The spelling of 129156080 in words is "one hundred twenty-nine million, one hundred fifty-six thousand, eighty".