129162980 has 24 divisors (see below), whose sum is σ = 271850040. Its totient is φ = 51549440.

The previous prime is 129162973. The next prime is 129162989. The reversal of 129162980 is 89261921.

It can be written as a sum of positive squares in 4 ways, for example, as 18113536 + 111049444 = 4256^2 + 10538^2 .

It is not an unprimeable number, because it can be changed into a prime (129162989) 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 7 ways as a sum of consecutive naturals, for example, 2216 + ... + 16224.

It is an arithmetic number, because the mean of its divisors is an integer number (11327085).

Almost surely, 2^129162980 is an apocalyptic number.

129162980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129162980 is an abundant number, since it is smaller than the sum of its proper divisors (142687060).

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

129162980 is a wasteful number, since it uses less digits than its factorization.

129162980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14479 (or 14477 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 129162980 is about 11364.9892212883. The cubic root of 129162980 is about 505.4901361678.

The spelling of 129162980 in words is "one hundred twenty-nine million, one hundred sixty-two thousand, nine hundred eighty".