12821707 has 4 divisors (see below), whose sum is σ = 13063680. Its totient is φ = 12579736.

The previous prime is 12821701. The next prime is 12821717. The reversal of 12821707 is 70712821.

12821707 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12821707 - 2⁷ = 12821579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12821701) 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, 120907 + ... + 121012.

It is an arithmetic number, because the mean of its divisors is an integer number (3265920).

Almost surely, 2^12821707 is an apocalyptic number.

12821707 is a deficient number, since it is larger than the sum of its proper divisors (241973).

12821707 is an equidigital number, since it uses as much as digits as its factorization.

12821707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241972.

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 12821707 is about 3580.7411244043. The cubic root of 12821707 is about 234.0535769886.

The spelling of 12821707 in words is "twelve million, eight hundred twenty-one thousand, seven hundred seven".