12128499 has 6 divisors (see below), whose sum is σ = 17518956. Its totient is φ = 8085660.

The previous prime is 12128483. The next prime is 12128507. The reversal of 12128499 is 99482121.

12128499 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12128499 - 2⁴ = 12128483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12128399) 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, 673797 + ... + 673814.

It is an arithmetic number, because the mean of its divisors is an integer number (2919826).

Almost surely, 2^12128499 is an apocalyptic number.

12128499 is a deficient number, since it is larger than the sum of its proper divisors (5390457).

12128499 is a wasteful number, since it uses less digits than its factorization.

12128499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347617 (or 1347614 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 12128499 is about 3482.5994601734. The cubic root of 12128499 is about 229.7571412594.

The spelling of 12128499 in words is "twelve million, one hundred twenty-eight thousand, four hundred ninety-nine".