12781283 has 4 divisors (see below), whose sum is σ = 12788688. Its totient is φ = 12773880.

The previous prime is 12781271. The next prime is 12781291. The reversal of 12781283 is 38218721.

12781283 is digitally balanced in base 3, 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, and also an emirpimes, since its reverse is a distinct semiprime: 38218721 = 5303 ⋅7207.

It is a cyclic number.

It is not a de Polignac number, because 12781283 - 2⁴ = 12781267 is a prime.

It is a super-2 number, since 2×12781283² = 326722390252178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12781183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410 + ... + 5072.

It is an arithmetic number, because the mean of its divisors is an integer number (3197172).

Almost surely, 2^12781283 is an apocalyptic number.

12781283 is a deficient number, since it is larger than the sum of its proper divisors (7405).

12781283 is an equidigital number, since it uses as much as digits as its factorization.

12781283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7404.

The product of its digits is 5376, while the sum is 32.

The square root of 12781283 is about 3575.0920267876. The cubic root of 12781283 is about 233.8073450201.

The spelling of 12781283 in words is "twelve million, seven hundred eighty-one thousand, two hundred eighty-three".