12128297 has 4 divisors (see below), whose sum is σ = 12264660. Its totient is φ = 11991936.

The previous prime is 12128269. The next prime is 12128329. The reversal of 12128297 is 79282121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79282121 = 4051 ⋅19571.

It can be written as a sum of positive squares in 2 ways, for example, as 5216656 + 6911641 = 2284^2 + 2629^2 .

It is a cyclic number.

It is not a de Polignac number, because 12128297 - 2¹² = 12124201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12128227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68048 + ... + 68225.

It is an arithmetic number, because the mean of its divisors is an integer number (3066165).

Almost surely, 2^12128297 is an apocalyptic number.

It is an amenable number.

12128297 is a deficient number, since it is larger than the sum of its proper divisors (136363).

12128297 is an equidigital number, since it uses as much as digits as its factorization.

12128297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136362.

The product of its digits is 4032, while the sum is 32.

The square root of 12128297 is about 3482.5704587273. The cubic root of 12128297 is about 229.7558657182.

The spelling of 12128297 in words is "twelve million, one hundred twenty-eight thousand, two hundred ninety-seven".