12780986 has 8 divisors (see below), whose sum is σ = 19434324. Its totient is φ = 6302880.

The previous prime is 12780983. The next prime is 12781007. The reversal of 12780986 is 68908721.

It can be written as a sum of positive squares in 2 ways, for example, as 12780625 + 361 = 3575^2 + 19^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12780983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43625 + ... + 43916.

Almost surely, 2^12780986 is an apocalyptic number.

12780986 is a deficient number, since it is larger than the sum of its proper divisors (6653338).

12780986 is an equidigital number, since it uses as much as digits as its factorization.

12780986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87616.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 12780986 is about 3575.0504891540. The cubic root of 12780986 is about 233.8055340042.

The spelling of 12780986 in words is "twelve million, seven hundred eighty thousand, nine hundred eighty-six".