13120403 has 4 divisors (see below), whose sum is σ = 13143720. Its totient is φ = 13097088.

The previous prime is 13120351. The next prime is 13120411. The reversal of 13120403 is 30402131.

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 13120403 - 2⁶ = 13120339 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (13120423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10793 + ... + 11946.

It is an arithmetic number, because the mean of its divisors is an integer number (3285930).

Almost surely, 2^13120403 is an apocalyptic number.

13120403 is a deficient number, since it is larger than the sum of its proper divisors (23317).

13120403 is an equidigital number, since it uses as much as digits as its factorization.

13120403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23316.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 13120403 is about 3622.2096847090. The cubic root of 13120403 is about 235.8571564486.

Adding to 13120403 its reverse (30402131), we get a palindrome (43522534).

The spelling of 13120403 in words is "thirteen million, one hundred twenty thousand, four hundred three".