12403128 has 32 divisors (see below), whose sum is σ = 31138560. Its totient is φ = 4116960.

The previous prime is 12403123. The next prime is 12403147. The reversal of 12403128 is 82130421.

12403128 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12403121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5551 + ... + 7457.

It is an arithmetic number, because the mean of its divisors is an integer number (973080).

Almost surely, 2^12403128 is an apocalyptic number.

It is an amenable number.

12403128 is an abundant number, since it is smaller than the sum of its proper divisors (18735432).

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

12403128 is a wasteful number, since it uses less digits than its factorization.

12403128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2187 (or 2183 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 12403128 is about 3521.8074904799. The cubic root of 12403128 is about 231.4783662748.

Adding to 12403128 its reverse (82130421), we get a palindrome (94533549).

The spelling of 12403128 in words is "twelve million, four hundred three thousand, one hundred twenty-eight".