13227421 has 4 divisors (see below), whose sum is σ = 13654144. Its totient is φ = 12800700.

The previous prime is 13227419. The next prime is 13227427. The reversal of 13227421 is 12472231.

13227421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12472231 = 619 ⋅20149.

It is a cyclic number.

It is not a de Polignac number, because 13227421 - 2¹ = 13227419 is a prime.

It is a super-2 number, since 2×13227421² = 349929332622482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13227392 and 13227401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13227427) 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, 213315 + ... + 213376.

It is an arithmetic number, because the mean of its divisors is an integer number (3413536).

Almost surely, 2^13227421 is an apocalyptic number.

It is an amenable number.

13227421 is a deficient number, since it is larger than the sum of its proper divisors (426723).

13227421 is an equidigital number, since it uses as much as digits as its factorization.

13227421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426722.

The product of its digits is 672, while the sum is 22.

The square root of 13227421 is about 3636.9521580576. The cubic root of 13227421 is about 236.4966856760.

Adding to 13227421 its reverse (12472231), we get a palindrome (25699652).

The spelling of 13227421 in words is "thirteen million, two hundred twenty-seven thousand, four hundred twenty-one".