9122128 has 40 divisors (see below), whose sum is σ = 19130720. Its totient is φ = 4199040.

The previous prime is 9122083. The next prime is 9122137. The reversal of 9122128 is 8212219.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10843 + ... + 11653.

It is an arithmetic number, because the mean of its divisors is an integer number (478268).

Almost surely, 2^9122128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9122128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9565360).

9122128 is an abundant number, since it is smaller than the sum of its proper divisors (10008592).

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

9122128 is a wasteful number, since it uses less digits than its factorization.

9122128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875 (or 869 counting only the distinct ones).

The product of its digits is 576, while the sum is 25.

The square root of 9122128 is about 3020.2860791653. The cubic root of 9122128 is about 208.9450341174.

Subtracting from 9122128 its reverse (8212219), we obtain a palindrome (909909).

The spelling of 9122128 in words is "nine million, one hundred twenty-two thousand, one hundred twenty-eight".