12128313 has 8 divisors (see below), whose sum is σ = 16255648. Its totient is φ = 8043264.

The previous prime is 12128269. The next prime is 12128329. The reversal of 12128313 is 31382121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12128313 - 2¹⁰ = 12127289 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12128313.

It is not an unprimeable number, because it can be changed into a prime (12128393) 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, 9895 + ... + 11052.

It is an arithmetic number, because the mean of its divisors is an integer number (2031956).

Almost surely, 2^12128313 is an apocalyptic number.

It is an amenable number.

12128313 is a deficient number, since it is larger than the sum of its proper divisors (4127335).

12128313 is a wasteful number, since it uses less digits than its factorization.

12128313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21143.

The product of its digits is 288, while the sum is 21.

The square root of 12128313 is about 3482.5727558803. The cubic root of 12128313 is about 229.7559667517.

The spelling of 12128313 in words is "twelve million, one hundred twenty-eight thousand, three hundred thirteen".