12782149 has 4 divisors (see below), whose sum is σ = 12798540. Its totient is φ = 12765760.

The previous prime is 12782129. The next prime is 12782153. The reversal of 12782149 is 94128721.

12782149 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.

It can be written as a sum of positive squares in 2 ways, for example, as 4120900 + 8661249 = 2030^2 + 2943^2 .

It is a cyclic number.

It is not a de Polignac number, because 12782149 - 2²¹ = 10684997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12782129) 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, 6964 + ... + 8605.

It is an arithmetic number, because the mean of its divisors is an integer number (3199635).

Almost surely, 2^12782149 is an apocalyptic number.

It is an amenable number.

12782149 is a deficient number, since it is larger than the sum of its proper divisors (16391).

12782149 is an equidigital number, since it uses as much as digits as its factorization.

12782149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16390.

The product of its digits is 8064, while the sum is 34.

The square root of 12782149 is about 3575.2131404995. The cubic root of 12782149 is about 233.8126254651.

The spelling of 12782149 in words is "twelve million, seven hundred eighty-two thousand, one hundred forty-nine".