12648509 has 8 divisors (see below), whose sum is σ = 13453440. Its totient is φ = 11857536.

The previous prime is 12648473. The next prime is 12648511. The reversal of 12648509 is 90584621.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12648509 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 (12648529) 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, 1589 + ... + 5274.

It is an arithmetic number, because the mean of its divisors is an integer number (1681680).

Almost surely, 2^12648509 is an apocalyptic number.

12648509 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12648509 is a deficient number, since it is larger than the sum of its proper divisors (804931).

12648509 is an equidigital number, since it uses as much as digits as its factorization.

12648509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6979.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 12648509 is about 3556.4742372187. The cubic root of 12648509 is about 232.9949159863.

The spelling of 12648509 in words is "twelve million, six hundred forty-eight thousand, five hundred nine".