12420803 has 4 divisors (see below), whose sum is σ = 12448440. Its totient is φ = 12393168.

The previous prime is 12420791. The next prime is 12420823. The reversal of 12420803 is 30802421.

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 12420803 - 2¹⁰ = 12419779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12420823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13133 + ... + 14046.

It is an arithmetic number, because the mean of its divisors is an integer number (3112110).

Almost surely, 2^12420803 is an apocalyptic number.

12420803 is a deficient number, since it is larger than the sum of its proper divisors (27637).

12420803 is an equidigital number, since it uses as much as digits as its factorization.

12420803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27636.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 12420803 is about 3524.3159619989. The cubic root of 12420803 is about 231.5882696851.

The spelling of 12420803 in words is "twelve million, four hundred twenty thousand, eight hundred three".