12684641 has 8 divisors (see below), whose sum is σ = 13034784. Its totient is φ = 12339360.

The previous prime is 12684583. The next prime is 12684643. The reversal of 12684641 is 14648621.

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-12684641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12684598 and 12684607.

It is not an unprimeable number, because it can be changed into a prime (12684643) 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, 4421 + ... + 6701.

It is an arithmetic number, because the mean of its divisors is an integer number (1629348).

Almost surely, 2^12684641 is an apocalyptic number.

It is an amenable number.

12684641 is a deficient number, since it is larger than the sum of its proper divisors (350143).

12684641 is an equidigital number, since it uses as much as digits as its factorization.

12684641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2431.

The product of its digits is 9216, while the sum is 32.

The square root of 12684641 is about 3561.5503646586. The cubic root of 12684641 is about 233.2165644767.

The spelling of 12684641 in words is "twelve million, six hundred eighty-four thousand, six hundred forty-one".