128482921 has 32 divisors (see below), whose sum is σ = 159344640. Its totient is φ = 101170944.

The previous prime is 128482919. The next prime is 128482927. The reversal of 128482921 is 129284821.

It is a happy number.

It is not a de Polignac number, because 128482921 - 2¹ = 128482919 is a prime.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (128482927) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1136961 + ... + 1137073.

It is an arithmetic number, because the mean of its divisors is an integer number (4979520).

Almost surely, 2^128482921 is an apocalyptic number.

It is an amenable number.

128482921 is a deficient number, since it is larger than the sum of its proper divisors (30861719).

128482921 is a wasteful number, since it uses less digits than its factorization.

128482921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325.

The product of its digits is 18432, while the sum is 37.

The square root of 128482921 is about 11335.0307013259. The cubic root of 128482921 is about 504.6014186579.

The spelling of 128482921 in words is "one hundred twenty-eight million, four hundred eighty-two thousand, nine hundred twenty-one".