128520132 has 48 divisors (see below), whose sum is σ = 323672832. Its totient is φ = 39456000.

The previous prime is 128520131. The next prime is 128520149. The reversal of 128520132 is 231025821.

It is not an unprimeable number, because it can be changed into a prime (128520131) 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, 116608 + ... + 117704.

It is an arithmetic number, because the mean of its divisors is an integer number (6743184).

Almost surely, 2^128520132 is an apocalyptic number.

128520132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128520132 is an abundant number, since it is smaller than the sum of its proper divisors (195152700).

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

128520132 is a wasteful number, since it uses less digits than its factorization.

128520132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868 (or 1866 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 128520132 is about 11336.6719984306. The cubic root of 128520132 is about 504.6501278841.

Adding to 128520132 its reverse (231025821), we get a palindrome (359545953).

The spelling of 128520132 in words is "one hundred twenty-eight million, five hundred twenty thousand, one hundred thirty-two".