12402403 has 6 divisors (see below), whose sum is σ = 13430004. Its totient is φ = 11448216.

The previous prime is 12402391. The next prime is 12402431. The reversal of 12402403 is 30420421.

It is not a de Polignac number, because 12402403 - 2¹³ = 12394211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12405403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36525 + ... + 36862.

It is an arithmetic number, because the mean of its divisors is an integer number (2238334).

Almost surely, 2^12402403 is an apocalyptic number.

12402403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12402403 is a deficient number, since it is larger than the sum of its proper divisors (1027601).

12402403 is an equidigital number, since it uses as much as digits as its factorization.

12402403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73413 (or 73400 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 12402403 is about 3521.7045588749. The cubic root of 12402403 is about 231.4738559855.

Adding to 12402403 its reverse (30420421), we get a palindrome (42822824).

The spelling of 12402403 in words is "twelve million, four hundred two thousand, four hundred three".