12782609 has 8 divisors (see below), whose sum is σ = 14751360. Its totient is φ = 10849536.

The previous prime is 12782599. The next prime is 12782629. The reversal of 12782609 is 90628721.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12782609 - 2¹⁶ = 12717073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12782629) 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, 8144 + ... + 9585.

It is an arithmetic number, because the mean of its divisors is an integer number (1843920).

Almost surely, 2^12782609 is an apocalyptic number.

It is an amenable number.

12782609 is a deficient number, since it is larger than the sum of its proper divisors (1968751).

12782609 is a wasteful number, since it uses less digits than its factorization.

12782609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17839.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 12782609 is about 3575.2774717496. The cubic root of 12782609 is about 233.8154302235.

The spelling of 12782609 in words is "twelve million, seven hundred eighty-two thousand, six hundred nine".