12390403 has 2 divisors, whose sum is σ = 12390404. Its totient is φ = 12390402.

The previous prime is 12390401. The next prime is 12390419. The reversal of 12390403 is 30409321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12390403 - 2¹ = 12390401 is a prime.

Together with 12390401, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12390401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6195201 + 6195202.

It is an arithmetic number, because the mean of its divisors is an integer number (6195202).

Almost surely, 2^12390403 is an apocalyptic number.

12390403 is a deficient number, since it is larger than the sum of its proper divisors (1).

12390403 is an equidigital number, since it uses as much as digits as its factorization.

12390403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 12390403 is about 3520.0004261363. Note that the first 3 decimals coincide. The cubic root of 12390403 is about 231.3991773767.

Adding to 12390403 its reverse (30409321), we get a palindrome (42799724).

The spelling of 12390403 in words is "twelve million, three hundred ninety thousand, four hundred three".