12902403 has 4 divisors (see below), whose sum is σ = 17203208. Its totient is φ = 8601600.

The previous prime is 12902401. The next prime is 12902423. The reversal of 12902403 is 30420921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30420921 = 3 ⋅10140307.

It is not a de Polignac number, because 12902403 - 2¹ = 12902401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12902403.

It is not an unprimeable number, because it can be changed into a prime (12902401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2150398 + ... + 2150403.

It is an arithmetic number, because the mean of its divisors is an integer number (4300802).

Almost surely, 2^12902403 is an apocalyptic number.

12902403 is a deficient number, since it is larger than the sum of its proper divisors (4300805).

12902403 is an equidigital number, since it uses as much as digits as its factorization.

12902403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4300804.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 12902403 is about 3591.9915088986. The cubic root of 12902403 is about 234.5435715988.

The spelling of 12902403 in words is "twelve million, nine hundred two thousand, four hundred three".