13221403 has 4 divisors (see below), whose sum is σ = 14238448. Its totient is φ = 12204360.

The previous prime is 13221401. The next prime is 13221413. The reversal of 13221403 is 30412231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30412231 = 2069 ⋅14699.

It is a cyclic number.

It is not a de Polignac number, because 13221403 - 2¹ = 13221401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13221401) 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, 508503 + ... + 508528.

It is an arithmetic number, because the mean of its divisors is an integer number (3559612).

Almost surely, 2^13221403 is an apocalyptic number.

13221403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

13221403 is a deficient number, since it is larger than the sum of its proper divisors (1017045).

13221403 is a wasteful number, since it uses less digits than its factorization.

13221403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017044.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 13221403 is about 3636.1247228334. The cubic root of 13221403 is about 236.4608144116.

Adding to 13221403 its reverse (30412231), we get a palindrome (43633634).

The spelling of 13221403 in words is "thirteen million, two hundred twenty-one thousand, four hundred three".