12820786 has 8 divisors (see below), whose sum is σ = 20979504. Its totient is φ = 5827620.

The previous prime is 12820783. The next prime is 12820789. The reversal of 12820786 is 68702821.

It is an interprime number because it is at equal distance from previous prime (12820783) and next prime (12820789).

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 (12820783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 291360 + ... + 291403.

It is an arithmetic number, because the mean of its divisors is an integer number (2622438).

Almost surely, 2^12820786 is an apocalyptic number.

12820786 is a deficient number, since it is larger than the sum of its proper divisors (8158718).

12820786 is a wasteful number, since it uses less digits than its factorization.

12820786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582776.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 12820786 is about 3580.6125174333. The cubic root of 12820786 is about 234.0479727294.

The spelling of 12820786 in words is "twelve million, eight hundred twenty thousand, seven hundred eighty-six".