12128953 has 4 divisors (see below), whose sum is σ = 12136420. Its totient is φ = 12121488.

The previous prime is 12128947. The next prime is 12128957. The reversal of 12128953 is 35982121.

12128953 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8020224 + 4108729 = 2832^2 + 2027^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12128953 is a prime.

It is a super-3 number, since 3×12128953³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12128957) 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, 150 + ... + 4927.

It is an arithmetic number, because the mean of its divisors is an integer number (3034105).

Almost surely, 2^12128953 is an apocalyptic number.

It is an amenable number.

12128953 is a deficient number, since it is larger than the sum of its proper divisors (7467).

12128953 is an equidigital number, since it uses as much as digits as its factorization.

12128953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7466.

The product of its digits is 4320, while the sum is 31.

The square root of 12128953 is about 3482.6646407600. The cubic root of 12128953 is about 229.7600080181.

The spelling of 12128953 in words is "twelve million, one hundred twenty-eight thousand, nine hundred fifty-three".