129122880 has 56 divisors (see below), whose sum is σ = 409968192. Its totient is φ = 34432512.

The previous prime is 129122867. The next prime is 129122881. The reversal of 129122880 is 88221921.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (129122881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66292 + ... + 68211.

Almost surely, 2^129122880 is an apocalyptic number.

129122880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129122880 is an abundant number, since it is smaller than the sum of its proper divisors (280845312).

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

129122880 is a wasteful number, since it uses less digits than its factorization.

129122880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134523 (or 134513 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 129122880 is about 11363.2248943687. The cubic root of 129122880 is about 505.4378191842.

The spelling of 129122880 in words is "one hundred twenty-nine million, one hundred twenty-two thousand, eight hundred eighty".