12720867 has 4 divisors (see below), whose sum is σ = 16961160. Its totient is φ = 8480576.

The previous prime is 12720847. The next prime is 12720887. The reversal of 12720867 is 76802721.

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

It is an interprime number because it is at equal distance from previous prime (12720847) and next prime (12720887).

It is a cyclic number.

It is not a de Polignac number, because 12720867 - 2¹⁰ = 12719843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12720847) 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, 2120142 + ... + 2120147.

It is an arithmetic number, because the mean of its divisors is an integer number (4240290).

Almost surely, 2^12720867 is an apocalyptic number.

12720867 is a deficient number, since it is larger than the sum of its proper divisors (4240293).

12720867 is an equidigital number, since it uses as much as digits as its factorization.

12720867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4240292.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 12720867 is about 3566.6324453187. The cubic root of 12720867 is about 233.4383674514.

The spelling of 12720867 in words is "twelve million, seven hundred twenty thousand, eight hundred sixty-seven".