12986643 has 8 divisors (see below), whose sum is σ = 17642448. Its totient is φ = 8494304.

The previous prime is 12986609. The next prime is 12986647. The reversal of 12986643 is 34668921.

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 12986643 - 2⁶ = 12986579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12986647) 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, 40680 + ... + 40997.

It is an arithmetic number, because the mean of its divisors is an integer number (2205306).

Almost surely, 2^12986643 is an apocalyptic number.

12986643 is a deficient number, since it is larger than the sum of its proper divisors (4655805).

12986643 is an equidigital number, since it uses as much as digits as its factorization.

12986643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81733.

The product of its digits is 62208, while the sum is 39.

The square root of 12986643 is about 3603.6985168019. The cubic root of 12986643 is about 235.0529109772.

The spelling of 12986643 in words is "twelve million, nine hundred eighty-six thousand, six hundred forty-three".