12748331 has 4 divisors (see below), whose sum is σ = 12757872. Its totient is φ = 12738792.

The previous prime is 12748289. The next prime is 12748343. The reversal of 12748331 is 13384721.

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 is a cyclic number.

It is not a de Polignac number, because 12748331 - 2²² = 8554027 is a prime.

It is a super-2 number, since 2×12748331² = 325039886571122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12748294 and 12748303.

It is not an unprimeable number, because it can be changed into a prime (12748361) 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, 2360 + ... + 5573.

It is an arithmetic number, because the mean of its divisors is an integer number (3189468).

Almost surely, 2^12748331 is an apocalyptic number.

12748331 is a deficient number, since it is larger than the sum of its proper divisors (9541).

12748331 is an equidigital number, since it uses as much as digits as its factorization.

12748331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9540.

The product of its digits is 4032, while the sum is 29.

The square root of 12748331 is about 3570.4804998767. The cubic root of 12748331 is about 233.6062423564.

The spelling of 12748331 in words is "twelve million, seven hundred forty-eight thousand, three hundred thirty-one".