128120124 has 36 divisors (see below), whose sum is σ = 328598312. Its totient is φ = 38823840.

The previous prime is 128120123. The next prime is 128120137. The reversal of 128120124 is 421021821.

It is a self number, because there is not a number n which added to its sum of digits gives 128120124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128120123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42667 + ... + 45570.

Almost surely, 2^128120124 is an apocalyptic number.

It is an amenable number.

128120124 is an abundant number, since it is smaller than the sum of its proper divisors (200478188).

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

128120124 is a wasteful number, since it uses less digits than its factorization.

128120124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88266 (or 88253 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 128120124 is about 11319.0160349741. The cubic root of 128120124 is about 504.1260235373.

Adding to 128120124 its reverse (421021821), we get a palindrome (549141945).

The spelling of 128120124 in words is "one hundred twenty-eight million, one hundred twenty thousand, one hundred twenty-four".