128121846 has 12 divisors (see below), whose sum is σ = 256299156. Its totient is φ = 42698040.

The previous prime is 128121821. The next prime is 128121869. The reversal of 128121846 is 648121821.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25416 + ... + 30036.

It is an arithmetic number, because the mean of its divisors is an integer number (21358263).

Almost surely, 2^128121846 is an apocalyptic number.

128121846 is an abundant number, since it is smaller than the sum of its proper divisors (128177310).

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

128121846 is an frugal number, since it uses more digits than its factorization.

128121846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9247 (or 4626 counting only the distinct ones).

The product of its digits is 6144, while the sum is 33.

The square root of 128121846 is about 11319.0921014011. The cubic root of 128121846 is about 504.1282820977.

Multiplying 128121846 by its product of digits (6144), we get a square (787180621824 = 887232²).

The spelling of 128121846 in words is "one hundred twenty-eight million, one hundred twenty-one thousand, eight hundred forty-six".