12320403 has 8 divisors (see below), whose sum is σ = 16809408. Its totient is φ = 8022504.

The previous prime is 12320401. The next prime is 12320411. The reversal of 12320403 is 30402321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12320403 - 2¹ = 12320401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12320401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47625 + ... + 47882.

It is an arithmetic number, because the mean of its divisors is an integer number (2101176).

Almost surely, 2^12320403 is an apocalyptic number.

12320403 is a deficient number, since it is larger than the sum of its proper divisors (4489005).

12320403 is an equidigital number, since it uses as much as digits as its factorization.

12320403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95553.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 12320403 is about 3510.0431621278. The cubic root of 12320403 is about 230.9625883455.

Adding to 12320403 its reverse (30402321), we get a palindrome (42722724).

The spelling of 12320403 in words is "twelve million, three hundred twenty thousand, four hundred three".