12445128 has 24 divisors (see below), whose sum is σ = 33705750. Its totient is φ = 4148352.

The previous prime is 12445123. The next prime is 12445129. The reversal of 12445128 is 82154421.

It can be written as a sum of positive squares in only one way, i.e., 11985444 + 459684 = 3462^2 + 678^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (12445123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 86353 + ... + 86496.

Almost surely, 2^12445128 is an apocalyptic number.

12445128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12445128 is an abundant number, since it is smaller than the sum of its proper divisors (21260622).

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

12445128 is a wasteful number, since it uses less digits than its factorization.

12445128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172861 (or 172854 counting only the distinct ones).

The product of its digits is 2560, while the sum is 27.

The square root of 12445128 is about 3527.7652983156. The cubic root of 12445128 is about 231.7393525409.

Adding to 12445128 its reverse (82154421), we get a palindrome (94599549).

The spelling of 12445128 in words is "twelve million, four hundred forty-five thousand, one hundred twenty-eight".