12720807 has 24 divisors (see below), whose sum is σ = 20791680. Its totient is φ = 7707960.

The previous prime is 12720793. The next prime is 12720839. The reversal of 12720807 is 70802721.

It is not a de Polignac number, because 12720807 - 2¹⁰ = 12719783 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 294 + ... + 5052.

It is an arithmetic number, because the mean of its divisors is an integer number (866320).

Almost surely, 2^12720807 is an apocalyptic number.

12720807 is a deficient number, since it is larger than the sum of its proper divisors (8070873).

12720807 is an equidigital number, since it uses as much as digits as its factorization.

12720807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4785 (or 4773 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 12720807 is about 3566.6240340131. The cubic root of 12720807 is about 233.4380004344.

The spelling of 12720807 in words is "twelve million, seven hundred twenty thousand, eight hundred seven".