129981120 has 112 divisors (see below), whose sum is σ = 418722048. Its totient is φ = 34155520.

The previous prime is 129981113. The next prime is 129981121. The reversal of 129981120 is 21189921.

It is not an unprimeable number, because it can be changed into a prime (129981121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67207 + ... + 69113.

Almost surely, 2^129981120 is an apocalyptic number.

129981120 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 129981120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209361024).

129981120 is an abundant number, since it is smaller than the sum of its proper divisors (288740928).

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

129981120 is a wasteful number, since it uses less digits than its factorization.

129981120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998 (or 1988 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 33.

The square root of 129981120 is about 11400.9262781583. The cubic root of 129981120 is about 506.5551770695. Note that the first 3 decimals are identical.

The spelling of 129981120 in words is "one hundred twenty-nine million, nine hundred eighty-one thousand, one hundred twenty".