120129660 has 144 divisors (see below), whose sum is σ = 422962176. Its totient is φ = 27029376.

The previous prime is 120129617. The next prime is 120129661. The reversal of 120129660 is 66921021.

It is a super-2 number, since 2×120129660² = 28862270423431200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120129661) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 83709 + ... + 85131.

Almost surely, 2^120129660 is an apocalyptic number.

120129660 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 120129660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211481088).

120129660 is an abundant number, since it is smaller than the sum of its proper divisors (302832516).

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

120129660 is a wasteful number, since it uses less digits than its factorization.

120129660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512 (or 1507 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 120129660 is about 10960.3676945621. The cubic root of 120129660 is about 493.4200003975.

The spelling of 120129660 in words is "one hundred twenty million, one hundred twenty-nine thousand, six hundred sixty".